Ответ:

  1. \(\frac{5}{17}+\frac{3}{17}=\frac{5+3}{17}=\frac{8}{17}\).
  2. \(\frac{5}{9}-\frac{1}{9}=\frac{5-1}{9}=\frac{4}{9}\).
  3. \(2\frac{3}{5}+3\frac{1}{5}=(2+3)+\left(\frac{3}{5}+\frac{1}{5}\right)=5\frac{4}{5}\).
  4. \(2\frac{5}{7}-1\frac{2}{7}=(2-1)+\left(\frac{5}{7}-\frac{2}{7}\right)=1\frac{3}{7}\).
  5. \(3\frac{5}{18}+1\frac{7}{18}=(3+1)+\frac{12}{18}=4\frac{2}{3}\).
  6. \(4\frac{8}{15}-2\frac{1}{15}=(4-2)+\frac{7}{15}=2\frac{7}{15}\).

Ответ: а) \(\frac{8}{17}\); б) \(\frac{4}{9}\); в) \(5\frac{4}{5}\); г) \(1\frac{3}{7}\); д) \(4\frac{2}{3}\); е) \(2\frac{7}{15}\).