Đặt tính rồi tính. (2 điểm) 245 789 012 + 56 219 307

245 789 012 + 56 219 307

\[\begin{array}{l} + \underline {\begin{array}{*{20}{c}}{245\,\,789\,\,012}\\{\,\,\,56\,\,219\,\,307}\end{array}} \\\,\,\,3\,02\,\,008\,\,319\end{array}\]

654 901 327 - 54 654 102

\[\begin{array}{l} - \underline {\begin{array}{*{20}{c}}{654\,\,901\,\,327}\\{\,\,\,54\,\,654\,\,102}\end{array}} \\\,\,600\,\,247\,\,227\end{array}\]

784 102 × 12

\[\begin{array}{l} \times \underline {\begin{array}{*{20}{c}}{\,\,\,\,784\,\,102}\\{\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,12}\end{array}} \\\,\,1\,\,568\,\,204\\\,\underline {7\,\,841\,\,02\,\,\,} \\\,9\,\,409\,\,224\end{array}\]

789 410 : 36