Ответ:

  1. а) \(4\frac{7}{10}+1\frac{8}{15}=5+\frac{21}{30}+\frac{16}{30}=5\frac{37}{30}=6\frac{7}{30}\).
  2. б) \(3\frac{3}{14}+1\frac{4}{63}=4+\frac{27}{126}+\frac{8}{126}=4\frac{35}{126}=4\frac{5}{18}\).
  3. в) \(4\frac{4}{15}-2\frac{9}{40}=2+\frac{32}{120}-\frac{27}{120}=2\frac{5}{120}=2\frac{1}{24}\).
  4. г) \(5\frac{1}{20}-2\frac{1}{12}=3+\frac{3}{60}-\frac{5}{60}=2\frac{58}{60}=2\frac{29}{30}\).

Ответ: а) \(6\frac{7}{30}\); б) \(4\frac{5}{18}\); в) \(2\frac{1}{24}\); г) \(2\frac{29}{30}\).