1. Выполните деление: 1) 3 1/3 : 5; 2) 20 : 1 3/7; 3) 2 2/9 : 1 7/9.

1. \(3\frac{1}{3}:5=\frac{10}{3}:5=\frac{10}{15}=\frac{2}{3}\).
2. \(20:1\frac{3}{7}=20:\frac{10}{7}=20\cdot\frac{7}{10}=14\).
3. \(2\frac{2}{9}:1\frac{7}{9}=\frac{20}{9}:\frac{16}{9}=\frac{20}{9}\cdot\frac{9}{16}=\frac{5}{4}=1\frac{1}{4}\).

Ответ: 1) \(\frac{2}{3}\); 2) \(14\); 3) \(1\frac{1}{4}\).