Ответ:

  1. Находим общий знаменатель и вычитаем числители: \(\frac{13}{18}-\frac{5}{24}=\frac{52}{72}-\frac{15}{72}=\frac{37}{72}\).
  2. \(\frac{11}{63}-\frac{1}{9}=\frac{11}{63}-\frac{7}{63}=\frac{4}{63}\).
  3. \(\frac{7}{8}-\frac{2}{3}=\frac{21}{24}-\frac{16}{24}=\frac{5}{24}\).
  4. \(\frac{4}{25}-\frac{6}{75}=\frac{12}{75}-\frac{6}{75}=\frac{6}{75}=\frac{2}{25}\).
  5. \(\frac{3}{18}-\frac{4}{27}=\frac{1}{6}-\frac{4}{27}=\frac{9}{54}-\frac{8}{54}=\frac{1}{54}\).
  6. \(\frac{26}{45}-\frac{16}{30}=\frac{26}{45}-\frac{24}{45}=\frac{2}{45}\).

Ответ: а) \(\frac{37}{72}\); б) \(\frac{4}{63}\); в) \(\frac{5}{24}\); г) \(\frac{2}{25}\); д) \(\frac{1}{54}\); е) \(\frac{2}{45}\).