4. Выполните умножение: а) 5/9 · 4/7; б) 15/17 · 34/45; в) 3 5/8 · 1 1/15; г) 3 1/7 · 1 3/11; д) 2 2/5 · 5/24; е) 3/8 · 4 4/15.

1. \(\frac{5}{9}\cdot\frac{4}{7}=\frac{20}{63}\).
2. \(\frac{15}{17}\cdot\frac{34}{45}=\frac{2}{3}\).
3. \(3\frac{5}{8}\cdot1\frac{1}{15}=\frac{29}{8}\cdot\frac{16}{15}=\frac{58}{15}=3\frac{13}{15}\).
4. \(3\frac{1}{7}\cdot1\frac{3}{11}=\frac{22}{7}\cdot\frac{14}{11}=4\).
5. \(2\frac{2}{5}\cdot\frac{5}{24}=\frac{12}{5}\cdot\frac{5}{24}=\frac{1}{2}\).
6. \(\frac{3}{8}\cdot4\frac{4}{15}=\frac{3}{8}\cdot\frac{64}{15}=\frac{8}{5}=1\frac{3}{5}\).

Ответ: а) \(\frac{20}{63}\); б) \(\frac{2}{3}\); в) \(3\frac{13}{15}\); г) 4; д) \(\frac{1}{2}\); е) \(1\frac{3}{5}\).