tính 26 + 14

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{26}\\{14}\end{array}} \\\,\,\,\,40\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{15}\\{15}\end{array}} \\\,\,\,\,30\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{13}\\{77}\end{array}} \\\,\,\,\,90\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{59}\\{16}\end{array}} \\\,\,\,\,75\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{39}\\{11}\end{array}} \\\,\,\,\,50\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{43}\\{47}\end{array}} \\\,\,\,\,90\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{27}\\{16}\end{array}} \\\,\,\,\,43\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{15}\\{79}\end{array}} \\\,\,\,\,94\end{array}\)