8 вариант: 1) 1/5 + 1/2; 2) 1 − 5/11; 3) 8 8/15 + 14 3/10; 4) 5 5/33 − 4 7/22; 5) 3/4 × 4/3; 6) 3 1/8 × 2 14/15; 7) 8 : 3/5; 8) 2 17/24 : 1 5/8

1. \(\frac{1}{5}+\frac{1}{2}=\frac{2}{10}+\frac{5}{10}=\frac{7}{10}\).
2. \(1-\frac{5}{11}=\frac{6}{11}\).
3. \(8\frac{8}{15}+14\frac{3}{10}=22+\frac{16}{30}+\frac{9}{30}=22\frac{5}{6}\).
4. \(5\frac{5}{33}-4\frac{7}{22}=1+\frac{10}{66}-\frac{21}{66}=\frac{55}{66}=\frac{5}{6}\).
5. \(\frac{3}{4}\times\frac{4}{3}=1\).
6. \(3\frac{1}{8}=\frac{25}{8}\), \(2\frac{14}{15}=\frac{44}{15}\); \(\frac{25}{8}\times\frac{44}{15}=\frac{55}{6}=9\frac{1}{6}\).
7. \(8:\frac{3}{5}=8\times\frac{5}{3}=\frac{40}{3}=13\frac{1}{3}\).
8. \(2\frac{17}{24}=\frac{65}{24}\), \(1\frac{5}{8}=\frac{13}{8}\); \(\frac{65}{24}:\frac{13}{8}=\frac{65}{24}\times\frac{8}{13}=\frac{5}{3}=1\frac{2}{3}\).

Ответ: 1) \(\frac{7}{10}\); 2) \(\frac{6}{11}\); 3) \(22\frac{5}{6}\); 4) \(\frac{5}{6}\); 5) \(1\); 6) \(9\frac{1}{6}\); 7) \(13\frac{1}{3}\); 8) \(1\frac{2}{3}\).