tính 80 - 6
9/44
\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{80}\\{\,\,6}\end{array}} \\\,\,\,\,74\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{26}\\{\,\,7}\end{array}} \\\,\,\,\,19\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{55}\\{\,\,8}\end{array}} \\\,\,\,\,47\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{77}\\{\,\,9}\end{array}} \\\,\,\,\,68\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{71}\\{\,\,5}\end{array}} \\\,\,\,\,66\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{72}\\{\,\,8}\end{array}} \\\,\,\,\,64\end{array}\) | \[\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{53}\\{\,\,4}\end{array}} \\\,\,\,\,49\end{array}\] | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{68}\\{\,\,\,9}\end{array}} \\\,\,\,\,59\end{array}\) |