tính 3 + 27
11/44
\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,3}\\{27}\end{array}} \\\,\,\,\,30\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,6}\\{24}\end{array}} \\\,\,\,\,30\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,8}\\{52}\end{array}} \\\,\,\,\,60\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,5}\\{35}\end{array}} \\\,\,\,\,40\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,7}\\{57}\end{array}} \\\,\,\,\,64\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,5}\\{75}\end{array}} \\\,\,\,\,80\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,9}\\{71}\end{array}} \\\,\,\,\,80\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{\,\,\,8}\\{66}\end{array}} \\\,\,\,\,74\end{array}\) |