Ответ:

  1. \(\frac{10}{11}-\frac{4}{11}+\frac{3}{11}=\frac{10-4+3}{11}=\frac{9}{11}\).

  2. \(4\frac{5}{9}+3\frac{8}{9}=7\frac{13}{9}=8\frac{4}{9}\).

  3. \(6-2\frac{3}{8}=5\frac{8}{8}-2\frac{3}{8}=3\frac{5}{8}\).

  4. \(5\frac{6}{13}-1\frac{11}{13}=4\frac{19}{13}=5\frac{6}{13}\).

Ответ: а) \(\frac{9}{11}\); б) \(8\frac{4}{9}\); в) \(3\frac{5}{8}\); г) \(3\frac{8}{13}\).