tính 24 + 69

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{24}\\{69}\end{array}} \\\,\,\,\,93\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{64}\\{\,\,\,9}\end{array}} \\\,\,\,\,55\end{array}\)

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

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{70}\\{28}\end{array}} \\\,\,\,\,42\end{array}\)