1. Выполните умножение: 1) 4/9 · 11/32; 2) 5/9 · 7/8; 3) 27/56 · 56/49; 4) 46/64 · 40/68.

1. \(\frac{4}{9}\cdot\frac{11}{32}=\frac{11}{72}\).
2. \(\frac{5}{9}\cdot\frac{7}{8}=\frac{35}{72}\).
3. \(\frac{27}{56}\cdot\frac{56}{49}=\frac{27}{49}\).
4. \(\frac{46}{64}\cdot\frac{40}{68}=\frac{23}{32}\cdot\frac{10}{17}=\frac{115}{272}\).

Ответ: 1) \(\frac{11}{72}\); 2) \(\frac{35}{72}\); 3) \(\frac{27}{49}\); 4) \(\frac{115}{272}\).