Ответ:

  1. \(\frac{11}{4}-\frac{2}{5}=\frac{55}{20}-\frac{8}{20}=\frac{47}{20}\).
  2. \(\frac{3}{2}-\frac{9}{25}=\frac{75}{50}-\frac{18}{50}=\frac{57}{50}\).
  3. \(\frac{3}{4}-\frac{1}{5}=\frac{15}{20}-\frac{4}{20}=\frac{11}{20}\).
  4. \(\frac{1}{4}-\frac{3}{25}=\frac{25}{100}-\frac{12}{100}=\frac{13}{100}\).
  5. \(\frac{17}{5}-\frac{13}{4}=\frac{68}{20}-\frac{65}{20}=\frac{3}{20}\).