Вариант 1 1) 5 : 1/4; 2) 1/5 : 4/4; 3) 1/6 : 25; 4) 14/15 : 3/8; 5) 2/5 : 4/9; 6) 1/2 : 3/7; 7) 2/7 : 7/12

Вариант 1

1. \( 5 : \frac{1}{4} = 5 \cdot 4 = 20 \)
2. \( \frac{1}{5} : \frac{4}{4} = \frac{1}{5} : 1 = \frac{1}{5} \)
3. \( \frac{1}{6} : 25 = \frac{1}{6} \cdot \frac{1}{25} = \frac{1}{150} \)
4. \( \frac{14}{15} : \frac{3}{8} = \frac{14}{15} \cdot \frac{8}{3} = \frac{14 \cdot 8}{15 \cdot 3} = \frac{112}{45} \)
5. \( \frac{2}{5} : \frac{4}{9} = \frac{2}{5} \cdot \frac{9}{4} = \frac{2 \cdot 9}{5 \cdot 4} = \frac{18}{20} = \frac{9}{10} \)
6. \( \frac{1}{2} : \frac{3}{7} = \frac{1}{2} \cdot \frac{7}{3} = \frac{1 \cdot 7}{2 \cdot 3} = \frac{7}{6} \)
7. \( \frac{2}{7} : \frac{7}{12} = \frac{2}{7} \cdot \frac{12}{7} = \frac{2 \cdot 12}{7 \cdot 7} = \frac{24}{49} \)