74 – 59 = ...	94 – 67 = ...	64 – 45 = ...	96 – 29 = ...
61 – 28 = ...	92 – 74 = ...	81 – 3 = ...	72 – 53 = ...
81 – 64 = ...	55 – 48 = ...	31 – 15 = ...	26 – 17 = ...
83 – 29 = ...	52 – 39 = ...	72 – 58 = ...	81 – 59 = ...
33 – 25 = ...	87 – 58 = ...	92 – 74 = ...	58 – 39 = ...

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

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

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

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

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

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

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

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

\[\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{40}\\{28}\end{array}} \\\,\,\,\,12\end{array}\]

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{70}\\{55}\end{array}} \\\,\,\,\,15\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{45}\\{26}\end{array}} \\\,\,\,\,19\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{53}\\{19}\end{array}} \\\,\,\,\,34\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{30}\\{12}\end{array}} \\\,\,\,\,18\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{62}\\{34}\end{array}} \\\,\,\,\,28\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{92}\\{66}\end{array}} \\\,\,\,\,26\end{array}\)

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