tính 176 + 512

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{176}\\{512}\end{array}} \\\,\,\,\,688\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{562}\\{216}\end{array}} \\\,\,\,\,778\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{460}\\{231}\end{array}} \\\,\,\,\,691\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{217}\\{611}\end{array}} \\\,\,\,\,828\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{233}\\{256}\end{array}} \\\,\,\,\,489\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{423}\\{533}\end{array}} \\\,\,\,\,956\end{array}\)