48900 : 80 = 611 (ост.20)
Проверка:
1) 20 < 80;
2) $\begin{array}{r}\times \underset{¯}{\begin{array}{r}611\\ 80\end{array}}\\ 0\\ 4888\phantom{0}\\ \overline{48880}\end{array}$;
3) 48880 + 20 = 48900.