2.208. Выполните действие: а) 1 4/15 − 17/20; б) 7 4/15 − 7/9; в) 2 5/12 − 7/8; г) 11 1/2 − 3 11/18; д) 9 2/11 − 7 5/9; е) 2 6/25 − 1 7/10; ж) 3 1/2 − 2 3/4; з) 12 5/12 − 9 13/18.

1. \(1\frac{4}{15}-\frac{17}{20}=1+\frac{16-17}{60}=\frac{5}{12}\).
2. \(7\frac{4}{15}-\frac{7}{9}=7-\frac{23}{45}=6\frac{22}{45}\).
3. \(2\frac{5}{12}-\frac{7}{8}=2-\frac{11}{24}=1\frac{13}{24}\).
4. \(11\frac{1}{2}-3\frac{11}{18}=8+\frac{9-11}{18}=7\frac{17}{18}\).
5. \(9\frac{2}{11}-7\frac{5}{9}=2-\frac{37}{99}=1\frac{62}{99}\).
6. \(2\frac{6}{25}-1\frac{7}{10}=1-\frac{23}{50}=\frac{27}{50}\).
7. \(3\frac{1}{2}-2\frac{3}{4}=1\frac{2}{4}-\frac{3}{4}=\frac{3}{4}\).
8. \(12\frac{5}{12}-9\frac{13}{18}=3+\frac{15-26}{36}=2\frac{25}{36}\).

Ответ: а) \(\frac{5}{12}\); б) \(6\frac{22}{45}\); в) \(1\frac{13}{24}\); г) \(7\frac{17}{18}\); д) \(1\frac{62}{99}\); е) \(\frac{27}{50}\); ж) \(\frac{3}{4}\); з) \(2\frac{25}{36}\).