Ответ:
Решение:
4. Деление дробей и смешанных чисел:
- \( \frac{1}{3} : \frac{1}{5} = \frac{1}{3} \times 5 = \frac{5}{3} \)
- \( \frac{3}{8} : \frac{2}{7} = \frac{3}{8} \times \frac{7}{2} = \frac{21}{16} \)
- \( \frac{25}{72} : \frac{75}{96} = \frac{25}{72} \times \frac{96}{75} = \frac{25 \times 96}{72 \times 75} = \frac{1 \times 4}{3 \times 3} = \frac{4}{9} \)
- \( \frac{15}{28} : \frac{40}{49} = \frac{15}{28} \times \frac{49}{40} = \frac{15 \times 49}{28 \times 40} = \frac{3 \times 7}{4 \times 8} = \frac{21}{32} \)
- \( 7 : \frac{1}{2} = 7 \times 2 = 14 \)
Ответ: \( \frac{5}{3}, \frac{21}{16}, \frac{4}{9}, \frac{21}{32}, 14 \).
