Đặt tính rồi tính. (2 điểm) 257 314 × 54

257 314 × 54

\(\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,\,\,\,\,\,257\,\,314}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,54} }\end{array}\\\,\,\,\,\,\,1\,\,029\,\,256\\\,\,\,\underline {12\,\,865\,\,70\,\,\,\,} \\\,\,\,13\,\,894\,\,956\end{array}\)

241 987 : 32

98 102 345 + 356 149 201

\(\begin{array}{l} + \begin{array}{*{20}{c}}{\,\,\,98\,\,102\,\,345}\\{\underline {356\,\,149\,\,201} }\end{array}\\\,\,\,\,454\,\,251\,\,546\end{array}\)

127 987 351 - 98 123 780

\(\begin{array}{l} - \begin{array}{*{20}{c}}{127\,\,987\,\,351}\\{\underline {\,\,\,98\,\,123\,\,780} }\end{array}\\\,\,\,\,\,\,\,29\,\,863\,\,571\end{array}\)