tính 54 – 17

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{54}\\{17}\end{array}} \\\,\,\,\,37\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{89}\\{\,\,4}\end{array}} \\\,\,\,\,93\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{86}\\{35}\end{array}} \\\,\,\,\,51\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{37}\\{37}\end{array}} \\\,\,\,\,74\end{array}\)