Ответ:

а) \(8\frac{4}{15} \cdot 2 = \frac{124}{15} \cdot 2 = \frac{248}{15} = 16\frac{8}{15}\).

б) \(3\frac{9}{14} \cdot 7 = \frac{51}{14} \cdot 7 = \frac{51}{2} = 25\frac{1}{2}\).

в) \(7\frac{4}{27} \cdot 5 = \frac{193}{27} \cdot 5 = \frac{965}{27} = 35\frac{20}{27}\).

г) \(8 \cdot 2\frac{1}{8} = 8 \cdot \frac{17}{8} = 17\).

д) \(5\frac{5}{6} \cdot 3 = \frac{35}{6} \cdot 3 = \frac{35}{2} = 17\frac{1}{2}\).

е) \(7\frac{7}{11} \cdot 11 = \frac{84}{11} \cdot 11 = 84\).

Ответ: а) \(16\frac{8}{15}\); б) \(25\frac{1}{2}\); в) \(35\frac{20}{27}\); г) 17; д) \(17\frac{1}{2}\); е) 84.