tính 561 + 127

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{561}\\{127}\end{array}} \\\,\,\,\,688\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{326}\\{253}\end{array}} \\\,\,\,\,579\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{375}\\{522}\end{array}} \\\,\,\,\,897\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{432}\\{261}\end{array}} \\\,\,\,\,693\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{732}\\{155}\end{array}} \\\,\,\,\,887\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{643}\\{\,\,\,35}\end{array}} \\\,\,\,\,678\end{array}\)