84 – 26 = ...	61 – 24 = ...	71 – 57 = ...	75 – 46 = ...
27 – 9 = ...	62 – 13 = ...	54 – 28 = ...	72 – 35 = ...
61 – 36 = ...	82 – 37 = ...	53 – 24 = ...	31 – 8 = ...
86 – 69 = ...	51 – 27 = ...	95 – 56 = ...	23 – 6 = ...
55 – 29 = ...	82 – 28 = ...	93 – 34 = ...	74 – 49 = ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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