tính 487 - 103

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{487}\\{103}\end{array}} \\\,\,\,\,384\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{275}\\{308}\end{array}} \\\,\,\,\,583\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{927}\\{456}\end{array}} \\\,\,\,\,471\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{856}\\{\,\,\,80}\end{array}} \\\,\,\,\,936\end{array}\)