Ответ:
- \(6\cdot\frac{8}{20}=\frac{48}{20}=\frac{12}{5}\).
- \(\frac{5}{8}\cdot4=\frac{20}{8}=\frac{5}{2}\).
- \(\frac{9}{28}\cdot56=9\cdot2=18\).
Ответ: 1) \(\frac{12}{5}\); 2) \(\frac{5}{2}\); 3) \(18\).
Ответ: 1) \(\frac{12}{5}\); 2) \(\frac{5}{2}\); 3) \(18\).