3. Вычисли: а) 2 1/4 · 8/9; б) 4 2/5 · 1 1/11; в) 5 1/6 · 2 2/5.

1. а) \(2\frac{1}{4}\cdot\frac{8}{9}=\frac{9}{4}\cdot\frac{8}{9}=2\).
2. б) \(4\frac{2}{5}\cdot1\frac{1}{11}=\frac{22}{5}\cdot\frac{12}{11}=\frac{24}{5}=4\frac{4}{5}\).
3. в) \(5\frac{1}{6}\cdot2\frac{2}{5}=\frac{31}{6}\cdot\frac{12}{5}=\frac{62}{5}=12\frac{2}{5}\).

Ответ: а) 2; б) \(4\frac{4}{5}\); в) \(12\frac{2}{5}\).