Ответ:\(6\cdot\frac{25}{9}=\frac{2}{3}\cdot25=\frac{50}{3}=16\frac23\).\(\frac58\cdot4=\frac52=2\frac12\).\(\frac9{28}\cdot56=9\cdot2=18\).Ответ: 1) \(16\frac23\); 2) \(2\frac12\); 3) \(18\).