tính 56 + 38

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{56}\\{38}\end{array}} \\\,\,\,\,94\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{66}\\{19}\end{array}} \\\,\,\,\,47\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{27}\\{27}\end{array}} \\\,\,\,\,54\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{57}\\{29}\end{array}} \\\,\,\,\,28\end{array}\)