Вычисли значения выражений с дробями: 7/9 - 5/6 * 4/15, (2/3 - 4/9) * 3/8, 2/7 + 3/8 : 7/32 и т.д.

Решаю примеры по порядку: 1. $\frac{7}{9} - \frac{5}{6} \cdot \frac{4}{15} = \frac{7}{9} - \frac{2}{9} = \frac{5}{9}$ 2. $(\frac{2}{3} - \frac{4}{9}) \cdot \frac{3}{8} = (\frac{6}{9} - \frac{4}{9}) \cdot \frac{3}{8} = \frac{2}{9} \cdot \frac{3}{8} = \frac{1}{12}$ 3. $\frac{2}{7} + \frac{3}{8} : \frac{7}{32} = \frac{2}{7} + \frac{3}{8} \cdot \frac{32}{7} = \frac{2}{7} + \frac{12}{7} = \frac{14}{7} = 2$ 4. $\frac{5}{9} \cdot (\frac{7}{9} + \frac{11}{18}) = \frac{5}{9} \cdot (\frac{14}{18} + \frac{11}{18}) = \frac{5}{9} \cdot \frac{25}{18} = \frac{125}{162}$ 5. $1 \frac{4}{7} : \frac{16}{21} = \frac{11}{7} : \frac{16}{21} = \frac{11}{7} \cdot \frac{21}{16} = \frac{11 \cdot 3}{16} = \frac{33}{16} = 2 \frac{1}{16}$ 6. $\frac{5}{12} \cdot (\frac{1}{5} + \frac{3}{25}) = \frac{5}{12} \cdot (\frac{5}{25} + \frac{3}{25}) = \frac{5}{12} \cdot \frac{8}{25} = \frac{2}{15}$ 7. $\frac{7}{39} \cdot (\frac{1}{7} + \frac{6}{49}) = \frac{7}{39} \cdot (\frac{7}{49} + \frac{6}{49}) = \frac{7}{39} \cdot \frac{13}{49} = \frac{1}{3} \cdot \frac{1}{7} = \frac{1}{21}$ 8. $\frac{9}{14} : (\frac{17}{24} - \frac{5}{12}) = \frac{9}{14} : (\frac{17}{24} - \frac{10}{24}) = \frac{9}{14} : \frac{7}{24} = \frac{9}{14} \cdot \frac{24}{7} = \frac{9 \cdot 12}{7 \cdot 7} = \frac{108}{49} = 2 \frac{10}{49}$ **Ответы:** 1. $\frac{5}{9}$ 2. $\frac{1}{12}$ 3. $2$ 4. $\frac{125}{162}$ 5. $2 \frac{1}{16}$ 6. $\frac{2}{15}$ 7. $\frac{1}{21}$ 8. $2 \frac{10}{49}$