II. Phần tự luận. (7 điểm)

Đặt tính rồi tính. (2 điểm)

410 789 234 + 95 641 327 ………………………………… ………………………………… …………………………………	5 497 124 - 689 012 ………………………………… ………………………………… …………………………………
4 054 × 51 ………………………………… ………………………………… ………………………………… ………………………………… ………………………………… …………………………………	69 450 : 49 ………………………………… ………………………………… ………………………………… ………………………………… ………………………………… …………………………………

410 789 234 + 95 641 327

\(\begin{array}{l} + \begin{array}{*{20}{c}}{410\,\,789\,\,234}\\{\underline {\,\,\,\,95\,\,641\,\,327} }\end{array}\\\,\,\,\,\,506\,\,430\,\,561\end{array}\)

5 497 124 - 689 012

\(\begin{array}{l} - \begin{array}{*{20}{c}}{5\,\,497\,\,124}\\{\underline {\,\,\,\,689\,\,012} }\end{array}\\\,\,\,\,4\,\,808\,\,112\end{array}\)

4 054 × 51

\(\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,\,\,\,4\,\,054}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,51} }\end{array}\\\,\,\,\,\,\,\,\,\,4\,\,054\\\,\,\,\underline {202\,\,70\,\,\,} \\\,\,\,206\,\,754\end{array}\)

69 450 : 49

 $\begin{array}{l}\begin{array}{c}69450\\ \underset{¯}{49}\end{array}\begin{array}{c}49\\ 1417\end{array}\\ 204\\ \underset{¯}{196}\\ 85\\ \underset{¯}{49}\\ 360\\ \underset{¯}{343}\\ 17\end{array}$