11978 : 52 = 230 (ост.18)
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}11978\\ \phantom{0}\underset{¯}{104}\\ \phantom{0}\underset{¯}{\phantom{0}}157\\ \phantom{00}\underset{¯}{156}\\ \phantom{000}\underset{¯}{\phantom{0}}18\\ \phantom{00000}\underset{¯}{0}\\ \phantom{0000}18\end{array}& \begin{array}{l}\overline{)52}\\ \overline{\overline{)230}}\end{array}\end{array}$
Проверка:
1) 18 < 52;
2) $\begin{array}{r}\times \underset{¯}{\begin{array}{r}230\\ 52\end{array}}\\ 460\\ 1150\phantom{0}\\ \overline{11960}\end{array}$;
3) 11960 + 18 = 11978.
 
34051 : 420 = 81 (ост.31)

Проверка:
1) 31 < 420;
2) $\begin{array}{r}\times \underset{¯}{\begin{array}{r}420\\ 81\end{array}}\\ 420\\ 3360\phantom{0}\\ \overline{34020}\end{array}$;
3) 34020 + 31 = 34051.
 
22700 : 74 = 306 (ост.56)
$\begin{array}{cc}\begin{array}{l}\underset{¯}{\phantom{0}}22700\\ \phantom{0}\underset{¯}{222}\\ \phantom{00}\underset{¯}{\phantom{0}}50\\ \phantom{0000}\underset{¯}{0}\\ \phantom{00}\underset{¯}{\phantom{0}}500\\ \phantom{000}\underset{¯}{444}\\ \phantom{0000}56\end{array}& \begin{array}{l}\overline{)74}\\ \overline{\overline{)306}}\end{array}\end{array}$
Проверка:
1) 56 < 74;
2) $\begin{array}{r}\times \underset{¯}{\begin{array}{r}306\\ 74\end{array}}\\ 1224\\ 2142\phantom{0}\\ \overline{22644}\end{array}$;
3) 22644 + 56 = 22700.