Câu hỏi:

12/01/2026 10 Lưu

\(\begin{array}{*{20}{c}}{72}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{12}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{16}\\\hline{45}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{64}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{18}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{26}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{35}\\\hline{74}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{37}\\\hline{42}\end{array}{\rm{  =  }} .......................... \)

 

\(\begin{array}{*{20}{c}}8\\\hline{69}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{23}\\\hline{32}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{17}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{51}\\\hline{52}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{18}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{36}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{19}\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{57}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{21}\\\hline{44}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{55}\\\hline{24}\end{array}{\rm{  =  }}............\)\(\begin{array}{*{20}{c}}{35}\\\hline{74}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{37}\\\hline{42}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{11}\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{66}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{57}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{20}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{29}\\\hline{50}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{58}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{22}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{15}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{17}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{34}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{31}\\\hline{76}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{62}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{54}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{52}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{37}\\\hline{39}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{65}\\\hline{74}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{36}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{18}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{45}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{26}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{23}\\\hline{29}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{58}\\\hline{69}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{14}\\\hline{29}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{58}\\\hline{77}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{45}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}8\\\hline{33}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{96}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{17}\\\hline{54}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{68}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{19}\\\hline{30}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{30}\\\hline{76}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{21}\\\hline{46}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{46}\\\hline{69}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{51}\\\hline{56}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{28}\\\hline{85}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{46}\\\hline{57}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{69}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{23}\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{69}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{10}\\\hline{39}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{15}\end{array}{\rm{  =  }}...........\)

\[\begin{array}{*{20}{c}}{50}\\\hline{63}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{10}\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}{88}\\\hline{93}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{66}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{32}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline{65}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{17}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{102}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{37}\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{74}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{41}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{82}\\\hline{91}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{45}\\\hline{56}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{29}\\\hline{85}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{51}\\\hline{58}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{81}\\\hline{94}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{47}\\\hline{54}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{40}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{10}\\\hline{49}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{76}\\\hline{85}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{38}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{28}\\\hline{33}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{62}\\\hline{69}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{23}\\\hline{46}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}9\\\hline{50}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{81}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{77}\\\hline{86}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{43}\\\hline{66}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{41}\\\hline{88}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{44}\\\hline{82}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{61}\\\hline{72}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{24}\\\hline{51}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{28}\\\hline{93}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{42}\end{array}{\rm{  =  }}............\)

\[\begin{array}{*{20}{c}}{31}\\\hline{38}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{93}\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}{40}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{34}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{25}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{17}\\\hline{84}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{42}\\\hline5\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{77}\\\hline{81}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{44}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{22}\\\hline{27}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{62}\\\hline{95}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{31}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{85}\\\hline{98}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{49}\\\hline{51}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{29}\\\hline{36}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{58}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{22}\\\hline{65}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{99}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{19}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{63}\\\hline{76}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{92}\\\hline{95}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{23}\end{array}{\rm{  =  }}............\)

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Trả lời:

verified Giải bởi Vietjack

\(\begin{array}{*{20}{c}}{72}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}6\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{16}\\\hline{45}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{64}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{18}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{35}\\\hline{74}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{37}\\\hline{42}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{69}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{23}\\\hline{32}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{17}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{51}\\\hline{52}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{18}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{36}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{19}\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{57}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{21}\\\hline{44}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{55}\\\hline{24}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{35}\\\hline{32}\end{array}\)

\(\begin{array}{*{20}{c}}{11}\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{66}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{57}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{20}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{29}\\\hline{50}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{58}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{22}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{15}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{34}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{31}\\\hline{76}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{62}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{54}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{52}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{37}\\\hline{39}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{65}\\\hline{74}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{36}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{18}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{45}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\)

\(\begin{array}{*{20}{c}}{23}\\\hline{29}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{58}\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline3\end{array}\)

\(\begin{array}{*{20}{c}}{14}\\\hline{29}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{58}\\\hline{77}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{45}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{33}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{96}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{36}\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{54}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{68}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\)

\(\begin{array}{*{20}{c}}{19}\\\hline{30}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{30}\\\hline{76}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{21}\\\hline{46}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{46}\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{23}\end{array}\)

\(\begin{array}{*{20}{c}}{51}\\\hline{56}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{28}\\\hline{85}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{46}\\\hline{57}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{23}\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{69}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{10}\\\hline{39}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{15}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\[\begin{array}{*{20}{c}}{50}\\\hline{63}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline7\end{array}\]

\(\begin{array}{*{20}{c}}{88}\\\hline{93}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{66}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{32}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline{65}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{55}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{102}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{30}\end{array}\)

\(\begin{array}{*{20}{c}}{37}\\\hline{58}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{29}\\\hline{74}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}{13}\\\hline{41}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{82}\\\hline{91}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{45}\\\hline{56}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{29}\\\hline{85}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{51}\\\hline{58}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{81}\\\hline{94}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{47}\\\hline{54}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{40}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{10}\\\hline{49}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{28}\end{array}\)

\(\begin{array}{*{20}{c}}{76}\\\hline{85}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{38}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline5\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{28}\\\hline{33}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}{62}\\\hline{69}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{23}\\\hline{46}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{31}\\\hline{69}\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline{50}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{81}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}{77}\\\hline{86}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{43}\\\hline{66}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{41}\\\hline{88}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{44}\\\hline{82}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline4\end{array}\)

\[\begin{array}{*{20}{c}}{61}\\\hline{72}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{24}\\\hline{51}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{61}\\\hline{153}\end{array}\]

\(\begin{array}{*{20}{c}}{28}\\\hline{93}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{42}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\[\begin{array}{*{20}{c}}{31}\\\hline{38}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{93}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline6\end{array}\]

\(\begin{array}{*{20}{c}}{40}\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{34}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{25}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{17}\\\hline{84}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{42}\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{17}\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}{77}\\\hline{81}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{44}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{22}\\\hline{27}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}{62}\\\hline{95}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{31}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline5\end{array}\)

\(\begin{array}{*{20}{c}}{85}\\\hline{98}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{49}\\\hline{51}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline6\end{array}\)

\[\begin{array}{*{20}{c}}{29}\\\hline{36}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{58}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline8\end{array}\]

\(\begin{array}{*{20}{c}}{22}\\\hline{65}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{99}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}{19}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{63}\\\hline{76}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}{92}\\\hline{95}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{19}\\\hline{23}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline5\end{array}\)

CÂU HỎI HOT CÙNG CHỦ ĐỀ

Câu 1

\(\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}.............\)\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}............\)

 

\(\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}.............\)

\[\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{  =  }}.............\)

\[\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}7\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{  =  }}............\)

Lời giải

\(\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{33}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{36}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}9\\\hline{80}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{24}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{55}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{20}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{63}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{15}\\\hline{88}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{70}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{99}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{36}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{35}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{33}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{16}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{35}\\\hline{99}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{27}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{20}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{63}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{10}\\\hline{99}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{35}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{10}\\\hline{27}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{40}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline7\end{array}\)

\[\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{33}\end{array}\]

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{48}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}6\\\hline{77}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{14}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}6\\\hline{35}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{10}\\\hline{27}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{14}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{12}\\\hline{55}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{16}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{44}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{54}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{80}\end{array}\)

\[\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{55}\end{array}\]

\(\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{56}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{30}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{32}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{20}\\\hline{63}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{14}\\\hline{55}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{10}\\\hline{117}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{15}\\\hline{56}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{96}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{12}\\\hline{77}\end{array}\)

Câu 2

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{13}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{13}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}............\)

\[\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{10}\\\hline{13}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{14}\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{12}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}7\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{12}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline4\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}9\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}8\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{33}\\\hline{16}\end{array}{\rm{  =  }}.............\)

\[\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{17}\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{21}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{36}\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{11}\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline5\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{24}\\\hline{35}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}9\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{26}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{32}\\\hline{21}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{81}\\\hline8\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{36}\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{49}\\\hline4\end{array}{\rm{  =  }}............\)

Lời giải

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{77}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{15}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{66}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{52}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{20}\\\hline{77}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{65}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{54}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{80}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{20}\\\hline{99}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{42}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{27}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{25}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{88}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{22}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{22}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{13}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{117}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{18}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline{99}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{22}\end{array}\)

\(\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{22}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{13}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{39}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{27}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{13}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{12}\\\hline{91}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{108}\end{array}\)

\[\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline{63}\end{array}\]

\(\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{20}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{33}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline{21}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline3\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{10}\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{14}\\\hline{45}\end{array}\)

\(\begin{array}{*{20}{c}}{10}\\\hline{13}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{24}\\\hline{13}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline3\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline9\end{array}\)

\(\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{14}\\\hline9\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{28}\\\hline{33}\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{13}\\\hline{27}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}7\\\hline{10}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}9\\\hline{14}\end{array}\)

\(\begin{array}{*{20}{c}}7\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{16}\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{12}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}2\\\hline3\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{16}\\\hline{35}\end{array}\)

\(\begin{array}{*{20}{c}}8\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{33}\\\hline{16}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline2\end{array}\)

\[\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{17}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{17}\end{array}\]

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}1\\\hline{30}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{36}\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}8\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}{11}\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline5\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{22}\\\hline5\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{24}\\\hline{35}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline4\end{array}\)

\(\begin{array}{*{20}{c}}9\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{11}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}{18}\\\hline{11}\end{array}\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{26}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}3\\\hline{91}\end{array}\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{12}\\\hline7\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}5\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{32}\\\hline{21}\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}4\\\hline7\end{array}\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{81}\\\hline8\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}9\\\hline2\end{array}\)

\(\begin{array}{*{20}{c}}{36}\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{49}\\\hline4\end{array}{\rm{  =  }}\begin{array}{*{20}{c}}9\\\hline7\end{array}\)

Câu 3

\(\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline2\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}7\\\hline8\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline6\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}1\\\hline4\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}1\\\hline5\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}1\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{  =  }}............\)

Lời giải

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Câu 4

\(\begin{array}{*{20}{c}}5\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{25}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{21}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{11}\\\hline{30}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{22}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{21}\\\hline{22}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}6\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{22}\\\hline{27}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{11}\\\hline{28}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}6\\\hline{13}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{26}\\\hline{27}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{24}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}7\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{21}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline8\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{21}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}7\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{27}\\\hline{28}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}9\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{27}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{10}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{20}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{11}\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{22}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{20}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{28}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}6\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{20}\\\hline{21}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{28}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}4\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{16}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{22}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{30}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{26}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}5\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{20}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}2\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{10}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}7\\\hline{27}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}8\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline4\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{12}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{16}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}7\\\hline{18}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{28}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{13}\\\hline{21}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{26}\end{array}{\rm{  =  }}...........\)

\[\begin{array}{*{20}{c}}{16}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}8\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{14}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{21}\\\hline{26}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}2\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{11}\\\hline{20}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{22}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{22}\\\hline{25}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}9\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{18}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{14}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline9\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{28}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{14}\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{26}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{28}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline{21}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{13}\\\hline{28}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{26}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{14}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{28}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{14}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{11}\\\hline{26}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{55}\end{array}{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}7\\\hline{20}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline{35}\end{array}{\rm{  =  }}............\)

\[\begin{array}{*{20}{c}}4\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{16}\end{array}{\rm{  =  }}............\]

\(\begin{array}{*{20}{c}}7\\\hline{16}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline{21}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{10}\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}6\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{28}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{39}\\\hline{62}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{52}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{17}\\\hline{20}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{34}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{64}\\\hline{75}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{48}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{17}\\\hline{64}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{16}\\\hline{51}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{68}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{34}\\\hline{35}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}{16}\\\hline{25}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{15}\\\hline{32}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}9\\\hline{62}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{31}\\\hline{45}\end{array}{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}8\\\hline{51}\end{array}{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{21}\end{array}{\rm{  =  }}............\)

Lời giải

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Câu 5

\(\begin{array}{*{20}{c}}2\\\hline{11}\end{array}{\rm{ }} \times {\rm{ }}11{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}7\\\hline{16}\end{array}{\rm{ }} \times {\rm{ }}8{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline{17}\end{array}{\rm{ }} \times {\rm{ }}2{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}9\\\hline{16}\end{array}{\rm{ }} \times {\rm{ }}8{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}6\\\hline{19}\end{array}{\rm{ }} \times {\rm{ }}2{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline5\end{array}{\rm{ }} \times {\rm{ 3  =  }}..............\)

\(\begin{array}{*{20}{c}}3\\\hline7\end{array}{\rm{ }} \times {\rm{ }}9{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}2\\\hline9\end{array}{\rm{ }} \times {\rm{ }}6{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}5\\\hline8\end{array}{\rm{ }} \times {\rm{ }}4{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}7\\\hline{10}\end{array}{\rm{ }} \times {\rm{ }}8{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{ }} \times {\rm{ }}6{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}10{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline9\end{array}{\rm{ }} \times {\rm{ }}5{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}7\\\hline{12}\end{array}{\rm{ }} \times {\rm{ }}6{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline6\end{array}{\rm{ }} \times {\rm{ }}9{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}2\\\hline7\end{array}{\rm{ }} \times {\rm{ }}14{\rm{  =  }}.............\)

\(5{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{10}\end{array}{\rm{  =  }}.............\)

\(6{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}8\\\hline9\end{array}{\rm{  =  }}..............\)

\(8{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{12}\end{array}{\rm{  =  }}.............\)

\(4{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}7\\\hline{36}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline7\end{array}{\rm{ }} \times {\rm{ }}14{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline3\end{array}{\rm{ }} \times {\rm{ }}9{\rm{  =  }}..............\)

\(5{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}9\\\hline{10}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline5\end{array}{\rm{ }} \times {\rm{ }}6{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}5\\\hline9\end{array}{\rm{ }} \times {\rm{ }}12{\rm{  =  }}.............\)

\(8{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{64}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}7\\\hline9\end{array}{\rm{ }} \times {\rm{ }}6{\rm{  =  }}..............\)

\(\begin{array}{*{20}{c}}5\\\hline7\end{array}{\rm{ }} \times {\rm{ }}14{\rm{  =  }}.............\)

\(15{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}2\\\hline5\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline8\end{array}{\rm{ }} \times {\rm{ }}24{\rm{  =  }}.............\)

\[18{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{36}\end{array}{\rm{  =  }}............\]

\(7{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}4\\\hline{21}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}2\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}9{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}3\\\hline{50}\end{array}{\rm{ }} \times {\rm{ 1}}0{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}5\\\hline{24}\end{array}{\rm{ }} \times {\rm{ }}12{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline{77}\end{array}{\rm{ }} \times {\rm{ }}11{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}4\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}5{\rm{  =  }}.............\)

\(4{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{16}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}8\\\hline{27}\end{array}{\rm{ }} \times {\rm{ }}3{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}5\\\hline{36}\end{array}{\rm{ }} \times {\rm{ }}6{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{15}\\\hline{32}\end{array}{\rm{ }} \times {\rm{ }}2{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{21}\\\hline{50}\end{array}{\rm{ }} \times {\rm{ }}3{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{27}\\\hline{64}\end{array}{\rm{ }} \times {\rm{ }}2{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{35}\\\hline{78}\end{array}{\rm{ }} \times {\rm{ }}3{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}4\\\hline{45}\end{array}{\rm{ }} \times {\rm{ }}18{\rm{  =  }}............\)

\(\begin{array}{*{20}{c}}2\\\hline{85}\end{array}{\rm{ }} \times {\rm{ }}48{\rm{  =  }}...........\)

\(\begin{array}{*{20}{c}}{22}\\\hline{63}\end{array}{\rm{ }} \times {\rm{ }}3{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{27}\\\hline{70}\end{array}{\rm{ }} \times {\rm{ }}2{\rm{  =  }}.............\)

\[\begin{array}{*{20}{c}}{16}\\\hline{33}\end{array}{\rm{ }} \times {\rm{ }}3{\rm{  =  }}.............\]

\(\begin{array}{*{20}{c}}{35}\\\hline{84}\end{array}{\rm{ }} \times {\rm{ }}3{\rm{  =  }}.............\)

\(18{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}3\\\hline{50}\end{array}{\rm{  =  }}............\)

\(3{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{48}\\\hline{99}\end{array}{\rm{  =  }}.............\)

\(3{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{47}\\\hline{96}\end{array}{\rm{  =  }}.............\)

\(4{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{25}\\\hline{72}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}9\\\hline{20}\end{array}{\rm{ }} \times {\rm{ }}3{\rm{  =  }}.............\)

\(4{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{17}\\\hline{36}\end{array}{\rm{  =  }}.............\)

\(2{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}5\\\hline{26}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}8\\\hline{15}\end{array}{\rm{ }} \times {\rm{ }}2{\rm{  =  }}.............\)

\(3{\rm{ }} \times {\rm{ }}\begin{array}{*{20}{c}}{13}\\\hline{28}\end{array}{\rm{  =  }}.............\)

\(\begin{array}{*{20}{c}}{19}\\\hline{40}\end{array}{\rm{ }} \times {\rm{ }}2{\rm{  =  }}.............\)

Lời giải

Bạn cần đăng ký gói VIP ( giá chỉ từ 199K ) để làm bài, xem đáp án và lời giải chi tiết không giới hạn.

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