1) Сократить неправильные дроби: 1) 21/17; 2) 52/10; 3) 67/8; 4) 76/15; 5) 33/4; 6) 100/21; 7) 39/12; 8) 31/19.

1. \(\frac{21}{17}=1\frac{4}{17}\)
2. \(\frac{52}{10}=\frac{26}{5}=5\frac{1}{5}\)
3. \(\frac{67}{8}=8\frac{3}{8}\)
4. \(\frac{76}{15}=5\frac{1}{15}\)
5. \(\frac{33}{4}=8\frac{1}{4}\)
6. \(\frac{100}{21}=4\frac{16}{21}\)
7. \(\frac{39}{12}=\frac{13}{4}=3\frac{1}{4}\)
8. \(\frac{31}{19}=1\frac{12}{19}\)

Ответ: 1) \(1\frac{4}{17}\); 2) \(5\frac{1}{5}\); 3) \(8\frac{3}{8}\); 4) \(5\frac{1}{15}\); 5) \(8\frac{1}{4}\); 6) \(4\frac{16}{21}\); 7) \(3\frac{1}{4}\); 8) \(1\frac{12}{19}\).