tính 40 - 2
\[\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{40}\\{\,\,2}\end{array}} \\\,\,\,\,38\end{array}\] | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{85}\\{\,\,8}\end{array}} \\\,\,\,77\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{88}\\{\,\,9}\end{array}} \\\,\,\,\,79\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{60}\\{\,\,5}\end{array}} \\\,\,\,\,55\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{22}\\{\,\,3}\end{array}} \\\,\,\,\,19\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{20}\\{\,\,1}\end{array}} \\\,\,\,\,19\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{32}\\{\,\,5}\end{array}} \\\,\,\,27\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{32}\\{\,\,4}\end{array}} \\\,\,\,28\end{array}\) |
