84 – 56 = ...	72 – 26 = ...	55 – 7 = ...	75 – 28 = ...
83 – 49 = ...	68 – 39 = ...	41 – 12 = ...	86 – 69 = ...
52 – 28 = ...	93 – 77 = ...	42 – 18 = ...	53 – 34 = ...
61 – 38 = ...	32 – 27 = ...	81 – 6 = ...	84 – 48 = ...
81 – 25 = ...	67 – 38 = ...	84 – 45 = ...	72 – 39 = ...

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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