5.503 Найдите значение произведения: 3 4 a) 4 ⋅ 15 3 б) 7 ⋅ 7 3 1 в) 8 ⋅ 3 г) (\frac{1}{6} + \frac{1}{6} + \frac{1}{6}) ⋅ \frac{2}{5}

а) \(\frac{3}{4} \cdot \frac{4}{15} = \frac{3 \cdot 4}{4 \cdot 15} = \frac{12}{60} = \frac{1}{5}\)

б) \(7 \cdot \frac{3}{7} = \frac{7 \cdot 3}{7} = \frac{21}{7} = 3\)

в) \(8 \cdot 3\frac{1}{3} = 8 \cdot \frac{10}{3} = \frac{80}{3} = 26\frac{2}{3}\)

г) \((\frac{1}{6} + \frac{1}{6} + \frac{1}{6}) \cdot \frac{2}{5} = \frac{3}{6} \cdot \frac{2}{5} = \frac{1}{2} \cdot \frac{2}{5} = \frac{2}{10} = \frac{1}{5}\)