tính 526 + 315

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{526}\\{315}\end{array}} \\\,\,\,\,841\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{719}\\{\,\,\,54}\end{array}} \\\,\,\,\,773\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{527}\\{145}\end{array}} \\\,\,\,\,672\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{719}\\{245}\end{array}} \\\,\,\,\,964\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{791}\\{176}\end{array}} \\\,\,\,\,967\end{array}\)

\(\begin{array}{l}\underline { + \begin{array}{*{20}{c}}{246}\\{444}\end{array}} \\\,\,\,\,690\end{array}\)