II. Phần tự luận. (7 điểm)

Đặt tính rồi tính. (2 điểm)

247 897 654 + 124 301 247 ……………………………….. ……………………………….. ………………………………..	951 345 012 - 98 671 302 ……………………………….. ……………………………….. ………………………………..
485 102 × 23 ……………………………….. ……………………………….. ……………………………….. ……………………………….. ……………………………….. ………………………………..	975 237 : 56 ……………………………….. ……………………………….. ……………………………….. ……………………………….. ……………………………….. ………………………………..

247 897 654 + 124 301 247

\(\begin{array}{l} + \begin{array}{*{20}{c}}{247\,\,897\,\,654}\\{\underline {124\,\,301\,\,247} }\end{array}\\\,\,\,\,\,372\,\,198\,\,901\end{array}\)

951 345 012 - 98 671 302

\(\begin{array}{l} - \begin{array}{*{20}{c}}{\,951\,\,345\,\,012}\\{\underline {\,\,\,\,98\,\,671\,\,302} }\end{array}\\\,\,\,\,852\,\,673\,\,710\end{array}\)

485 102 × 23

\(\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,\,\,\,\,\,\,\,485\,\,102}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,23} }\end{array}\\\,\,\,\,\,\,\,1\,\,455\,\,306\\\,\,\,\,\,\underline {\,9\,\,702\,\,04\,\,\,\,} \\\,\,\,\,\,11\,\,157\,\,346\end{array}\)

975 237 : 56

$\begin{array}{l}\begin{array}{c}975237\\ \underset{¯}{56}\end{array}\begin{array}{c}56\\ 17414\end{array}\\ 415\\ \underset{¯}{392}\\ 232\\ \underset{¯}{224}\\ 83\\ \underset{¯}{56}\\ 277\\ \underset{¯}{224}\\ 53\end{array}$