tính 60 – 19

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{60}\\{19}\end{array}} \\\,\,\,\,41\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{59}\\{21}\end{array}} \\\,\,\,\,80\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{76}\\{67}\end{array}} \\\,\,\,\,\,\,\,9\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{18}\\{75}\end{array}} \\\,\,\,\,93\end{array}\)