tính 75 – 48

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{75}\\{48}\end{array}} \\\,\,\,\,27\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{28}\\{15}\end{array}} \\\,\,\,\,43\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{50}\\{38}\end{array}} \\\,\,\,\,12\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{27}\\{49}\end{array}} \\\,\,\,\,76\end{array}\)