Bài tập Toán lớp 5 Nhân hai số thập phân có đáp án

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{5,2}\\{3,7}\end{array}} \\\,\,\,\,364\\\underline {\,156\,\,\,\,\,} \\19,24\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{0,46}\\{\,\,\,8,1}\end{array}} \\\,\,\,\,\,\,\,\,\,\,46\\\underline {\,\,\,\,368\,\,\,\,} \\\,\,3,726\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{12,9}\\{0,53}\end{array}} \\\,\,\,\,\,\,\,387\\\underline {\,\,\,\,645\,\,\,} \\\,\,6,837\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{0,087}\\{\,\,\,\,\,2,4}\end{array}} \\\,\,\,\,\,\,\,\,\,\,348\\\underline {\,\,\,\,\,\,\,174\,\,\,} \\\,\,0,2088\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{0,315}\\{\,\,\,\,\,6,8}\end{array}} \\\,\,\,\,\,\,\,2520\\\underline {\,\,\,\,\,1890\,\,\,\,} \\\,\,\,2,142\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{27,4}\\{0,29}\end{array}} \\\,\,\,\,2466\\\underline {\,\,\,\,548\,\,\,\,} \\\,\,7,946\end{array}\)

\[\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{1,73}\\{\,\,4,5}\end{array}} \\\,\,\,\,\,\,865\\\underline {\,\,\,692\,\,} \\\,7,785\end{array}\]

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{0,0092}\\{\,\,\,\,\,\,\,\,5,6}\end{array}} \\\,\,\,\,\,\,\,\,\,\,\,\,\,552\\\underline {\,\,\,\,\,\,\,\,\,\,460\,\,\,\,} \\\,\,0,05152\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{9,64}\\{\,\,\,\,1,2}\end{array}} \\\,\,\,\,\,1928\\\underline {\,\,\,\,964\,\,\,\,} \\11,568\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{0,0578}\\{\,\,\,\,\,\,\,\,3,9}\end{array}} \\\,\,\,\,\,\,\,\,\,\,5202\\\underline {\,\,\,\,\,\,\,1734\,\,\,} \\\,\,0,22542\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{\,\,\,\,\,\,3,2}\\{0,076}\end{array}} \\\,\,\,\,\,\,\,\,\,\,152\\\underline {\,\,\,\,\,\,228\,\,\,} \\\,\,0,2432\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{0,412}\\{\,\,\,\,\,7,3}\end{array}} \\\,\,\,\,\,\,\,1236\\\underline {\,\,\,2884\,\,\,} \\\,3,0076\end{array}\)

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{0,1286}\\{\,\,\,\,\,\,\,9,4}\end{array}} \\\,\,\,\,\,\,\,\,\,5144\\\underline {\,\,\,\,11574\,\,\,} \\\,\,1,20884\end{array}\)

\(\begin{array}{l}\underline {\,\,\,\, \times \begin{array}{*{20}{c}}{2,507}\\{\,\,0,84}\end{array}} \\\,\,\,\,\,\,10028\\\underline {\,\,20056\,\,\,} \\\,2,10588\end{array}\)

\(\begin{array}{l}\underline {\,\,\, \times \begin{array}{*{20}{c}}{6,28}\\{\,\,6,9}\end{array}} \\\,\,\,\,\,5652\\\underline {\,\,3768\,\,\,} \\43,332\end{array}\)

\(\begin{array}{l}\underline {\,\,\, \times \begin{array}{*{20}{c}}{322,12}\\{\,\,\,\,\,\,\,\,6,8}\end{array}} \\\,\,\,\,\,257696\\\underline {\,\,\,193272\,\,} \\2190,416\end{array}\)

0,735 × 7,8 =  5,733

\(\begin{array}{l}\underline {\, \times \begin{array}{*{20}{c}}{0,735}\\{\,\,\,\,\,7,8}\end{array}} \\\,\,\,\,\,5880\\\underline {\,\,5145\,\,\,} \\5,733\end{array}\)

9,82 × 7,3 = 71,686

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{9,82}\\{\,\,7,3}\end{array}} \\\,\,\,\,2946\\\underline {\,6874\,\,\,} \\71,686\end{array}\)

71,35 × 6,5 = 463,775

\[\begin{array}{l}\,\,\underline {\, \times \begin{array}{*{20}{c}}{71,35}\\{\,\,\,\,\,6,5}\end{array}} \\\,\,\,\,\,35675\\\underline {\,\,42810\,\,\,} \\463,775\end{array}\]

71,7 × 88,2 = 6323,94

\(\begin{array}{l}\,\,\,\,\,\,\underline { \times \begin{array}{*{20}{c}}{71,7}\\{88,2}\end{array}} \\\,\,\,\,\,\,\,\,1434\\\,\,\,\,\,5736\\\underline {\,\,5736\,\,\,\,\,\,} \\6323,94\end{array}\)

1,8 × 32,3 = 58,14

\(\begin{array}{l}\underline { \times \begin{array}{*{20}{c}}{\,\,\,\,1,8}\\{32,3}\end{array}} \\\,\,\,\,\,\,\,\,54\\\,\,\,\,\,36\\\underline {\,\,54\,\,\,\,\,\,} \\58,14\end{array}\)

6,19 × 0,458 = 2,83502

\(\begin{array}{l}\underline {\,\,\,\, \times \begin{array}{*{20}{c}}{\,\,\,\,6,19}\\{0,458}\end{array}} \\\,\,\,\,\,\,\,\,\,4952\\\,\,\,\,\,\,3095\\\underline {\,\,\,2476\,\,\,\,\,\,} \\\,2,83502\end{array}\)

8,7 × 9,5 = 82,65

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{8,7}\\{9,5}\end{array}} \\\,\,\,\,435\\\underline {\,783\,\,\,\,} \\82,65\end{array}\)

19,4 × 4,1 = 79,54

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{19,4}\\{\,\,\,4,1}\end{array}} \\\,\,\,\,\,\,\,\,194\\\underline {\,\,\,\,776\,\,\,\,} \\\,\,79,54\end{array}\)

54,5 × 0,7 = 38,15

\(\begin{array}{l}\underline {\,\, \times \begin{array}{*{20}{c}}{54,5}\\{\,\,0,7}\end{array}} \\\,\,\,3815\\\underline {\,\,\,000} \,\,\,\,\\\,\,38,15\end{array}\)

2,34 × 1,5 = 3,51

0,5 × 4,6 = 2,3

2,3 × 1,4 = 3,22

1,5 × 0,8 = 1,2

0,7 × 5,2 = 3,64

3,15 × 0,8 = 2,52

4,5 × 0,4 = 1,8

0,95 × 4,6 = 4,37

1,6 × 1,5 = 2,4

6,7 × 1,24 = 8,308

0,175 × 6,4 = 1,12

2,83 × 3,2 = 9,056

3,5 × 0,6 = 2,1

7,4 × 0,63 = 4,662

1,2 × 3,5 = 4,2

0,75 × 3,6 = 2,7

2,7 × 0,3 = 0,81

9,1 × 2,75 = 25,025

4,12 × 0,8 = 3,296

4,25 × 1,8 = 7,65

5,2 × 0,5 = 2,6

0,39 × 7,2 = 2,808

0,9 × 2,2 = 1,98

5,6 × 3,14 = 17,584

2,5 × 1,6 = 4

2,7 × 0,148 = 0,3996

1,7 × 0,4 = 0,68

8,3 × 0,95 = 7,885

1,25 × 2,4 = 3

1,06 × 4,8 = 5,088

6,3 × 0,2 = 1,26

0,624 × 5,7 = 3,5568

2,3 × 1,5 = 3,45

1,25 × 0,8 = 1

0,48 × 2,5 = 1,2

0,48 × 2,5 = 1,2

1,8 × 0,7 = 1,26

3,14 × 0,5 = 1,57

0,9 × 5,5 = 4,95

2,6 × 1,3 = 3,38

4,2 × 0,3 = 1,26

1,75 × 0,4 = 0,7

4,35 × 0,7 = 3,045

0,64 × 1,5 = 0,96

1,4 × 2,5 = 3,5

5,3 × 0,4 = 2,12

3,15 × 1,2 = 3,78

2,8 × 0,75 = 2,1

6,28 × 0,5 = 3,14

1,05 × 0,8 = 0,84

2,7 × 0,9 = 2,43

4,6 × 0,25 = 1,15

0,18 × 5 = 0,9

3,2 × 1,25 = 4

5,1 × 0,6 = 3,06

0,72 × 1,5 = 1,08

1,6 × 3,5 = 5,6

2,4 × 0,35 = 0,84

2,75 × 1,6 = 4,4

7,5 × 0,08 = 0,6

4,8 × 0,7 = 3,36

1,12 × 2,5 = 2,8

3,6 × 0,25 = 0,9

1,44 × 2,5 = 3,6

0,325 × 2,4 = 0,78

1,44 × 0,875 = 1,26

3,75 × 0,16 = 0,6

0,112 × 5,5 = 0,616

2,64 × 0,375 = 0,99

4,8 × 0,125 = 0,6

0,96 × 1,25 = 1,2

3,24 × 0,25 = 0,81

1,08 × 0,75 = 0,81

0,144 × 6,25 = 0,9

5,6 × 0,175 = 0,98

2,16 × 0,45 = 0,972