1. Выполните умножение: 1) 3/7 · 8/11; 2) 8/15 · 35/48; 3) 41/75 · 5/41; 4) 38/39 · 26/57.

1. \(\frac{3}{7}\cdot\frac{8}{11}=\frac{24}{77}\).
2. \(\frac{8}{15}\cdot\frac{35}{48}=\frac{1}{6}\cdot\frac{7}{3}=\frac{7}{18}\).
3. \(\frac{41}{75}\cdot\frac{5}{41}=\frac{5}{75}=\frac{1}{15}\).
4. \(\frac{38}{39}\cdot\frac{26}{57}=\frac{2\cdot13}{3\cdot13}\cdot\frac{2\cdot13}{3\cdot19}=\frac{52}{171}\).

Ответ: 1) \(\frac{24}{77}\); 2) \(\frac{7}{18}\); 3) \(\frac{1}{15}\); 4) \(\frac{52}{171}\).