Вычислите: (3/8 - 1/4) * 5/6.

Привет! Давай решим примеры с дробями. 4) $( \frac{3}{8} - \frac{1}{4} ) \cdot \frac{5}{6} = ( \frac{3}{8} - \frac{2}{8} ) \cdot \frac{5}{6} = \frac{1}{8} \cdot \frac{5}{6} = \frac{5}{48}$ 5) $( \frac{9}{10} + \frac{2}{5} ) \cdot \frac{1}{2} = ( \frac{9}{10} + \frac{4}{10} ) \cdot \frac{1}{2} = \frac{13}{10} \cdot \frac{1}{2} = \frac{13}{20}$ 6) $( \frac{4}{3} - \frac{1}{6} ) \cdot \frac{7}{8} = ( \frac{8}{6} - \frac{1}{6} ) \cdot \frac{7}{8} = \frac{7}{6} \cdot \frac{7}{8} = \frac{49}{48} = 1 \frac{1}{48}$ 7) $( \frac{5}{6} + \frac{1}{2} ) \cdot \frac{2}{9} = ( \frac{5}{6} + \frac{3}{6} ) \cdot \frac{2}{9} = \frac{8}{6} \cdot \frac{2}{9} = \frac{4}{3} \cdot \frac{2}{9} = \frac{8}{27}$