Ответ:

  1. \(3\frac{2}{7}+5\frac{3}{14}=8+\frac{4}{14}+\frac{3}{14}=8\frac{1}{2}\).
  2. Общий знаменатель дробных частей — 24: \(7\frac{3}{8}+1\frac{5}{6}=8+\frac{9}{24}+\frac{20}{24}=8+1\frac{5}{24}=9\frac{5}{24}\).
  3. \(7+3\frac{5}{8}=10\frac{5}{8}\).
  4. \(\frac{2}{3}+4\frac{3}{5}=4+\frac{10}{15}+\frac{9}{15}=5\frac{4}{15}\).

Ответ: \(8\frac{1}{2}\); \(9\frac{5}{24}\); \(10\frac{5}{8}\); \(5\frac{4}{15}\).