Đặt tính rồi tính. (2 điểm) 457 946 + 17 301 987

457 946 + 17 301 987

\(\begin{array}{l} + \begin{array}{*{20}{c}}{\,\,\,\,\,\,457\,\,946}\\{\underline {17\,\,301\,\,987} }\end{array}\\\,\,\,\,17\,\,759\,\,933\end{array}\)

657 971 365 - 98 234 017

\(\begin{array}{l} - \begin{array}{*{20}{c}}{657\,\,971\,\,365}\\{\underline {\,\,\,98\,\,234\,\,017} }\end{array}\\\,\,\,\,559\,\,737\,\,348\end{array}\)

457 210 × 23

\(\begin{array}{l} \times \begin{array}{*{20}{c}}{\,\,\,\,\,\,\,457\,\,210}\\{\underline {\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,23} }\end{array}\\\,\,\,\,\,\,\,1\,\,371\,\,630\\\,\,\,\underline {\,\,\,9\,\,144\,\,20\,\,\,} \\\,\,\,10\,\,515\,\,830\end{array}\)

689 012 : 89