Ответ:

  1. а) \(1-\frac{4}{5}=\frac{5}{5}-\frac{4}{5}=\frac{1}{5}\).
  2. б) \(2-\frac{3}{7}=\frac{14}{7}-\frac{3}{7}=\frac{11}{7}=1\frac{4}{7}\).
  3. в) \(7-\frac{4}{13}=\frac{91}{13}-\frac{4}{13}=\frac{87}{13}=6\frac{9}{13}\).
  4. г) \(6-1\frac{5}{9}=6-\frac{14}{9}=\frac{54}{9}-\frac{14}{9}=\frac{40}{9}=4\frac{4}{9}\).
  5. д) \(9-3\frac{4}{7}=9-\frac{25}{7}=\frac{63}{7}-\frac{25}{7}=\frac{38}{7}=5\frac{3}{7}\).
  6. е) \(5-4\frac{2}{11}=5-\frac{46}{11}=\frac{55}{11}-\frac{46}{11}=\frac{9}{11}\).

Ответ: а) \(\frac{1}{5}\); б) \(1\frac{4}{7}\); в) \(6\frac{9}{13}\); г) \(4\frac{4}{9}\); д) \(5\frac{3}{7}\); е) \(\frac{9}{11}\).