tính 50 - 27

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{50}\\{27}\end{array}} \\\,\,\,\,23\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{56}\\{39}\end{array}} \\\,\,\,\,17\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{62}\\{26}\end{array}} \\\,\,\,\,36\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{71}\\{22}\end{array}} \\\,\,\,\,49\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{74}\\{29}\end{array}} \\\,\,\,\,45\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{84}\\{47}\end{array}} \\\,\,\,\,37\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{93}\\{54}\end{array}} \\\,\,\,\,39\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{30}\\{13}\end{array}} \\\,\,\,\,17\end{array}\)