3. Найдите произведение: 1) 5/8 · 3/7; 2) 2 2/15 · 1 9/16; 3) 2 6/11 · 2 5/14; 4) 1 7/8 · 1 1/15 · 1 7/16.

1. \(\frac{5}{8}\cdot\frac{3}{7}=\frac{15}{56}\).
2. \(2\frac{2}{15}\cdot1\frac{9}{16}=\frac{32}{15}\cdot\frac{25}{16}=\frac{10}{3}=3\frac{1}{3}\).
3. \(2\frac{6}{11}\cdot2\frac{5}{14}=\frac{28}{11}\cdot\frac{33}{14}=6\).
4. \(1\frac{7}{8}\cdot1\frac{1}{15}\cdot1\frac{7}{16}=\frac{15}{8}\cdot\frac{16}{15}\cdot\frac{23}{16}=\frac{23}{8}=2\frac{7}{8}\).

Ответ: 1) \(\frac{15}{56}\); 2) \(3\frac{1}{3}\); 3) 6; 4) \(2\frac{7}{8}\).