1. Выполните действие: а) \(\frac{5}{6}\cdot\frac{7}{9}\); б) \(\frac{11}{28}\cdot\frac{7}{33}\); в) \(3\frac{5}{7}\cdot1\frac{1}{13}\); г) \(2\frac{2}{3}\cdot6\); д) \(\frac{3}{8}:\frac{9}{16}\); е) \(\frac{15}{16}:5\).

1. \(\frac{5}{6}\cdot\frac{7}{9}=\frac{35}{54}\).
2. \(\frac{11}{28}\cdot\frac{7}{33}=\frac{1}{12}\).
3. \(3\frac{5}{7}\cdot1\frac{1}{13}=\frac{26}{7}\cdot\frac{14}{13}=4\).
4. \(2\frac{2}{3}\cdot6=\frac{8}{3}\cdot6=16\).
5. \(\frac{3}{8}:\frac{9}{16}=\frac{3}{8}\cdot\frac{16}{9}=\frac{2}{3}\).
6. \(\frac{15}{16}:5=\frac{15}{16}\cdot\frac{1}{5}=\frac{3}{16}\).

Ответ: а) \(\frac{35}{54}\); б) \(\frac{1}{12}\); в) \(4\); г) \(16\); д) \(\frac{2}{3}\); е) \(\frac{3}{16}\).