Ответ:

1) \(8 \cdot \frac{5}{49}=\frac{40}{49}\).

3) \(\frac{9}{22}\cdot44=9\cdot2=18\).

5) \(4\frac{4}{9}\cdot2\frac{5}{8}=\frac{40}{9}\cdot\frac{21}{8}=\frac{5}{9}\cdot21=\frac{35}{3}=11\frac{2}{3}\).

Ответ: 1) \(\frac{40}{49}\); 3) \(18\); 5) \(11\frac{2}{3}\).