tính 36 + 39

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{36}\\{39}\end{array}} \\\,\,\,\,75\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{70}\\{35}\end{array}} \\\,\,\,\,35\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{15}\\{67}\end{array}} \\\,\,\,\,82\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{100}\\{\,\,\,\,\,8}\end{array}} \\\,\,\,\,\,\,92\end{array}\)