tính 112 + 668

\[\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{112}\\{668}\end{array}} \\\,\,\,780\end{array}\]

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{527}\\{455}\end{array}} \\\,\,\,\,\,\,\,72\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{781}\\{128}\end{array}} \\\,\,\,\,909\end{array}\)

\(\begin{array}{l}\underline { - \begin{array}{*{20}{c}}{967}\\{576}\end{array}} \\\,\,\,\,391\end{array}\)