tính 75 + 25

\[\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{75}\\{25}\end{array}} \\\,\,100\end{array}\]

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{81}\\{33}\end{array}} \\\,\,\,\,48\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{24}\\{66}\end{array}} \\\,\,\,\,90\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{64}\\{17}\end{array}} \\\,\,\,\,47\end{array}\)