Ответ:

  1. \(4\frac{5}{8}-1\frac{3}{8}=3\frac{2}{8}=3\frac{1}{4}\).
  2. \(5\frac{2}{7}-2\frac{5}{7}=4\frac{9}{7}-2\frac{5}{7}=2\frac{4}{7}\).
  3. \(3\frac{1}{4}-1\frac{3}{4}=2\frac{5}{4}-1\frac{3}{4}=1\frac{2}{4}=1\frac{1}{2}\).

Ответ: 1) \(3\frac{1}{4}\); 2) \(2\frac{4}{7}\); 3) \(1\frac{1}{2}\).