tính 351 - 123
Giải thích
\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{351}\\{123}\end{array}} \\\,\,\,228\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{871}\\{\,\,\,56}\end{array}} \\\,\,\,\,815\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{872}\\{590}\end{array}} \\\,\,\,\,282\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{378}\\{187}\end{array}} \\\,\,\,\,191\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{708}\\{240}\end{array}} \\\,\,\,\,468\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{593}\\{365}\end{array}} \\\,\,\,\,228\end{array}\) |