Ответ:

  1. а) \(\frac{11}{50}-\frac{3}{25}+\frac{1}{20}=\frac{22}{100}-\frac{12}{100}+\frac{5}{100}=\frac{15}{100}=\frac{3}{20}\).
  2. б) \(8-3\frac{6}{7}=7\frac{7}{7}-3\frac{6}{7}=4\frac{1}{7}\).
  3. в) \(2\frac{1}{8}+3\frac{5}{12}=5+\frac{3}{24}+\frac{10}{24}=5\frac{13}{24}\).
  4. г) \(5\frac{13}{15}+1\frac{7}{12}=6+\frac{52}{60}+\frac{35}{60}=7\frac{27}{60}=7\frac{9}{20}\).
  5. д) \(7\frac{3}{8}-3\frac{5}{6}=4+\frac{9}{24}-\frac{20}{24}=3\frac{13}{24}\).

Ответ: а) 3/20; б) 4 1/7; в) 5 13/24; г) 7 9/20; д) 3 13/24.