3. Сократите дроби

Решение:

а) \( \frac{10}{15} = \frac{2}{3} \), \( \frac{12}{18} = \frac{2}{3} \), \( \frac{24}{48} = \frac{1}{2} \), \( \frac{28}{35} = \frac{4}{5} \)

б) \( \frac{8 \cdot 11}{33 \cdot 4} = \frac{8}{33} \cdot \frac{11}{4} = \frac{2}{3} \cdot \frac{1}{1} = \frac{2}{3} \)

в) \( \frac{18 \cdot 25}{75 \cdot 12} = \frac{18}{75} \cdot \frac{25}{12} = \frac{3}{3} \cdot \frac{1}{2} = \frac{1}{2} \)

г) \( \frac{6 \cdot 7 + 7 \cdot 5}{49} = \frac{7(6+5)}{49} = \frac{7 \cdot 11}{49} = \frac{11}{7} \)