tính 67 + 13

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{67}\\{13}\end{array}} \\\,\,\,\,80\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{100}\\{\,\,\,26}\end{array}} \\\,\,\,\,\,\,\,74\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{91}\\{\,\,\,9}\end{array}} \\\,100\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{100}\\{\,\,\,63}\end{array}} \\\,\,\,\,\,\,\,37\end{array}\)