53. Найдите частное: 4 : 1/7; 5 : 2/3; 6 : 3/5; 7 : 1/2; 8 : 9/10; 9 : 1/3; 4/9 : 2; 3/5 : 3; 6/7 : 4; 5/7 : 5; 9/10 : 6; 3/7 : 7.

1. \(4:\frac{1}{7}=4\cdot7=28\).
2. \(5:\frac{2}{3}=5\cdot\frac{3}{2}=\frac{15}{2}=7\frac{1}{2}\).
3. \(6:\frac{3}{5}=6\cdot\frac{5}{3}=10\).
4. \(7:\frac{1}{2}=7\cdot2=14\).
5. \(8:\frac{9}{10}=8\cdot\frac{10}{9}=\frac{80}{9}=8\frac{8}{9}\).
6. \(9:\frac{1}{3}=9\cdot3=27\).
7. \(\frac{4}{9}:2=\frac{4}{9}\cdot\frac{1}{2}=\frac{2}{9}\).
8. \(\frac{3}{5}:3=\frac{3}{5}\cdot\frac{1}{3}=\frac{1}{5}\).
9. \(\frac{6}{7}:4=\frac{6}{7}\cdot\frac{1}{4}=\frac{3}{14}\).
10. \(\frac{5}{7}:5=\frac{5}{7}\cdot\frac{1}{5}=\frac{1}{7}\).
11. \(\frac{9}{10}:6=\frac{9}{10}\cdot\frac{1}{6}=\frac{3}{20}\).
12. \(\frac{3}{7}:7=\frac{3}{7}\cdot\frac{1}{7}=\frac{3}{49}\).

Ответ: \(28;\ 7\frac{1}{2};\ 10;\ 14;\ 8\frac{8}{9};\ 27;\ \frac{2}{9};\ \frac{1}{5};\ \frac{3}{14};\ \frac{1}{7};\ \frac{3}{20};\ \frac{3}{49}\).