tính 94 – 38

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

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{27}\\{44}\end{array}} \\\,\,\,\,71\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{65}\\{27}\end{array}} \\\,\,\,\,38\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{55}\\{16}\end{array}} \\\,\,\,\,71\end{array}\)