tính 643 - 61
Giải thích
\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{643}\\{\,\,\,61}\end{array}} \\\,\,\,\,582\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{938}\\{819}\end{array}} \\\,\,\,\,119\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{370}\\{\,\,\,56}\end{array}} \\\,\,\,\,314\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{350}\\{\,\,\,25}\end{array}} \\\,\,\,\,325\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{763}\\{149}\end{array}} \\\,\,\,\,614\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{639}\\{472}\end{array}} \\\,\,\,\,167\end{array}\) |