tính 71 + 19
32/44
\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{71}\\{19}\end{array}} \\\,\,\,\,90\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{28}\\{39}\end{array}} \\\,\,\,\,67\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{37}\\{36}\end{array}} \\\,\,\,\,73\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{19}\\{48}\end{array}} \\\,\,\,\,67\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{19}\\{25}\end{array}} \\\,\,\,\,44\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{23}\\{39}\end{array}} \\\,\,\,\,62\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{25}\\{59}\end{array}} \\\,\,\,\,84\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{64}\\{17}\end{array}} \\\,\,\,\,81\end{array}\) |