tính 25 + 17

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{25}\\{17}\end{array}} \\\,\,\,\,42\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{15}\\{26}\end{array}} \\\,\,\,\,41\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{48}\\{16}\end{array}} \\\,\,\,\,64\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{36}\\{48}\end{array}} \\\,\,\,\,84\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{28}\\{34}\end{array}} \\\,\,\,\,62\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{24}\\{17}\end{array}} \\\,\,\,\,41\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{27}\\{25}\end{array}} \\\,\,\,\,52\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{69}\\{21}\end{array}} \\\,\,\,\,90\end{array}\)