10000 − (10 + 910 * 85 : 65) = 10000 − (10 + 77350 : 65) = 10000 − (10 + 1190) = 10000 − 1200 = 8800
1) $\begin{array}{r}\times \underset{¯}{\begin{array}{r}91\\ 85\end{array}}\\ 455\\ 728\phantom{0}\\ \overline{7735}\end{array}$;
2) $\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}77350\\ \phantom{0}\underset{¯}{65}\\ \underset{¯}{\phantom{0}}123\\ \phantom{00}\underset{¯}{65}\\ \phantom{0}\underset{¯}{\phantom{0}}585\\ \phantom{00}\underset{¯}{585}\\ \phantom{0000}\underset{¯}{\phantom{0}}0\\ \phantom{00000}\underset{¯}{0}\\ \phantom{00000}0\end{array}& \begin{array}{l}\overline{)65}\\ \overline{\overline{)1190}}\end{array}\end{array}$;
3) 10 + 1190 = 1200;
4) 10000 − 1200 = 8800.
 
12000 : (840 − 280 * 96 : 42) = 12000 : (840 − 26880 : 42) = 12000 : (840 − 640) = 12000 : 200 = 60
1) $\begin{array}{r}\times \underset{¯}{\begin{array}{r}28\\ 96\end{array}}\\ 168\\ 252\phantom{0}\\ \overline{2688}\end{array}$;
2) $\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}26880\\ \phantom{0}\underset{¯}{252}\\ \phantom{0}\underset{¯}{\phantom{0}}168\\ \phantom{00}\underset{¯}{168}\\ \phantom{0000}\underset{¯}{\phantom{0}}0\\ \phantom{00000}\underset{¯}{0}\\ \phantom{00000}0\end{array}& \begin{array}{l}\overline{)42}\\ \overline{\overline{)640}}\end{array}\end{array}$;
3) 840 − 640 = 200;
) 12000 : 200 = 60.
 
67068 : 324 = 207
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}67068\\ \phantom{0}\underset{¯}{648}\\ \phantom{0}\underset{¯}{\phantom{0}}226\\ \phantom{0000}\underset{¯}{0}\\ \phantom{0}\underset{¯}{\phantom{0}}2268\\ \phantom{00}\underset{¯}{2268}\\ \phantom{00000}0\end{array}& \begin{array}{l}\overline{)324}\\ \overline{\overline{)207}}\end{array}\end{array}$
 
226720 : 436 = 520
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}226720\\ \phantom{0}\underset{¯}{2180}\\ \phantom{00}\underset{¯}{\phantom{0}}872\\ \phantom{000}\underset{¯}{872}\\ \phantom{00000}\underset{¯}{\phantom{0}}0\\ \phantom{000000}\underset{¯}{0}\\ \phantom{000000}0\end{array}& \begin{array}{l}\overline{)436}\\ \overline{\overline{)520}}\end{array}\end{array}$