tính 285 - 117
Giải thích
\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{285}\\{117}\end{array}} \\\,\,\,\,168\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{975}\\{428}\end{array}} \\\,\,\,\,547\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{726}\\{\,\,\,82}\end{array}} \\\,\,\,\,644\end{array}\) | \[\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{982}\\{\,\,\,\,\,\,3}\end{array}} \\\,\,\,\,979\end{array}\] | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{680}\\{655}\end{array}} \\\,\,\,\,\,\,\,25\end{array}\) | \(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{812}\\{350}\end{array}} \\\,\,\,\,462\end{array}\) |