Ответ:

  1. \(1-\frac{4}{5}=\frac{5}{5}-\frac{4}{5}=\frac{1}{5}\).
  2. \(2-\frac{3}{7}=1+\left(\frac{7}{7}-\frac{3}{7}\right)=1\frac{4}{7}\).
  3. \(7-\frac{4}{13}=6+\left(\frac{13}{13}-\frac{4}{13}\right)=6\frac{9}{13}\).
  4. \(6-1\frac{5}{9}=5-\frac{5}{9}=4\frac{4}{9}\).
  5. \(9-3\frac{4}{7}=6-\frac{4}{7}=5\frac{3}{7}\).
  6. \(5-4\frac{2}{11}=1-\frac{2}{11}=\frac{9}{11}\).

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) \(\frac{9}{11}\).