Задание № 7. Выполните деление: 1) 9/10 : 3; 2) 4/7 : 2; 3) 11/15 : 22; 4) 20/21 : 5; 5) 4/13 : 10; 6) 8/11 : 2; 7) 3/7 : 12; 8) 27/32 : 54.

1. \(\frac{9}{10}:3=\frac{9}{10}\cdot\frac{1}{3}=\frac{3}{10}\).
2. \(\frac{4}{7}:2=\frac{4}{7}\cdot\frac{1}{2}=\frac{2}{7}\).
3. \(\frac{11}{15}:22=\frac{11}{15}\cdot\frac{1}{22}=\frac{1}{30}\).
4. \(\frac{20}{21}:5=\frac{20}{21}\cdot\frac{1}{5}=\frac{4}{21}\).
5. \(\frac{4}{13}:10=\frac{4}{13}\cdot\frac{1}{10}=\frac{2}{65}\).
6. \(\frac{8}{11}:2=\frac{8}{11}\cdot\frac{1}{2}=\frac{4}{11}\).
7. \(\frac{3}{7}:12=\frac{3}{7}\cdot\frac{1}{12}=\frac{1}{28}\).
8. \(\frac{27}{32}:54=\frac{27}{32}\cdot\frac{1}{54}=\frac{1}{64}\).

Ответ: 1) 3/10; 2) 2/7; 3) 1/30; 4) 4/21; 5) 2/65; 6) 4/11; 7) 1/28; 8) 1/64.