tính 28 + 46
Giải thích
\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{28}\\{46}\end{array}} \\\,\,\,\,74\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{58}\\{38}\end{array}} \\\,\,\,\,20\end{array}\) | \(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{38}\\{26}\end{array}} \\\,\,\,\,64\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{97}\\{37}\end{array}} \\\,\,\,\,60\end{array}\) |