60. Найдите произведение: 1) 5 · 3/26; 2) 5/8 · 4; 3) 9/28 · 56; 4) 6 6/7 · 3/8; 5) 5 1/7 · 1 8/27; 6) 1 8/9 · 1 1/8 · 2 2/3.

1. \(5\cdot\frac{3}{26}=\frac{15}{26}\).
2. \(\frac{5}{8}\cdot4=\frac{20}{8}=\frac{5}{2}=2\frac{1}{2}\).
3. \(\frac{9}{28}\cdot56=9\cdot2=18\).
4. \(6\frac{6}{7}\cdot\frac{3}{8}=\frac{48}{7}\cdot\frac{3}{8}=\frac{18}{7}=2\frac{4}{7}\).
5. \(5\frac{1}{7}\cdot1\frac{8}{27}=\frac{36}{7}\cdot\frac{35}{27}=\frac{20}{3}=6\frac{2}{3}\).
6. \(1\frac{8}{9}\cdot1\frac{1}{8}\cdot2\frac{2}{3}=\frac{17}{9}\cdot\frac{9}{8}\cdot\frac{8}{3}=\frac{17}{3}=5\frac{2}{3}\).

Ответ: 1) \(\frac{15}{26}\); 2) \(2\frac{1}{2}\); 3) 18; 4) \(2\frac{4}{7}\); 5) \(6\frac{2}{3}\); 6) \(5\frac{2}{3}\).