5. 5 : 5/8 4. 8/9 120 : 1/10 в) 12 : 5/8 1/3 : 3/5 5/7 : 10 10/11 : 5

Решение:

1. \( 5 : \frac{5}{8} = 5 \cdot \frac{8}{5} = 8 \)
2. \( \frac{8}{9} \)
3. \( 120 : \frac{1}{10} = 120 \cdot 10 = 1200 \)
4. \( 12 : \frac{5}{8} = 12 \cdot \frac{8}{5} = \frac{96}{5} = 19 \frac{1}{5} \)
5. \( \frac{1}{3} : \frac{3}{5} = \frac{1}{3} \cdot \frac{5}{3} = \frac{5}{9} \)
6. \( \frac{5}{7} : 10 = \frac{5}{7} \cdot \frac{1}{10} = \frac{1}{14} \)
7. \( \frac{10}{11} : 5 = \frac{10}{11} \cdot \frac{1}{5} = \frac{2}{11} \)