52 – 18 = ...	74 – 68 = ...	87 – 58 = ...	32 – 13 = ...
85 – 77 = ...	64 – 37 = ...	40 – 26 = ...	76 – 39 = ...
72 – 55 = ...	22 – 14 = ...	44 – 27 = ...	77 – 29 = ...
42 – 9 = ...	33 – 15 = ...	44 – 17 = ...	92 – 58 = ...
56 – 49 = ...	71 – 22 = ...	53 – 8 = ...	84 – 79 = ...

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{80}\\{\,\,6}\end{array}} \\\,\,\,\,74\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{26}\\{\,\,7}\end{array}} \\\,\,\,\,19\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{55}\\{\,\,8}\end{array}} \\\,\,\,\,47\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{77}\\{\,\,9}\end{array}} \\\,\,\,\,68\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{71}\\{\,\,5}\end{array}} \\\,\,\,\,66\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{72}\\{\,\,8}\end{array}} \\\,\,\,\,64\end{array}\)

\[\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{53}\\{\,\,4}\end{array}} \\\,\,\,\,49\end{array}\]

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{68}\\{\,\,\,9}\end{array}} \\\,\,\,\,59\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{24}\\{15}\end{array}} \\\,\,\,\,\,\,\,9\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{54}\\{29}\end{array}} \\\,\,\,\,25\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{71}\\{25}\end{array}} \\\,\,\,\,46\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{72}\\{55}\end{array}} \\\,\,\,\,17\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{62}\\{27}\end{array}} \\\,\,\,\,35\end{array}\)

\[\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{83}\\{35}\end{array}} \\\,\,\,\,48\end{array}\]

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{60}\\{23}\end{array}} \\\,\,\,\,37\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{72}\\{46}\end{array}} \\\,\,\,\,26\end{array}\)