tính 38 + 38

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{38}\\{38}\end{array}} \\\,\,\,\,76\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{65}\\{\,\,\,\,8}\end{array}} \\\,\,\,\,\,57\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{85}\\{\,\,\,5}\end{array}} \\\,\,\,\,90\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{82}\\{28}\end{array}} \\\,\,\,\,54\end{array}\)