1. Выполните умножение: 1) \(\frac{6}{7} \cdot \frac{3}{5}\); 2) \(\frac{9}{32} \cdot \frac{16}{81}\); 3) \(\frac{8}{19} \cdot \frac{19}{72}\); 4) \(\frac{44}{65} \cdot \frac{25}{77}\);

1) \(\frac{6}{7} \cdot \frac{3}{5} = \frac{6 \cdot 3}{7 \cdot 5} = \frac{18}{35}\) 2) \(\frac{9}{32} \cdot \frac{16}{81} = \frac{9 \cdot 16}{32 \cdot 81} = \frac{1 \cdot 1}{2 \cdot 9} = \frac{1}{18}\) 3) \(\frac{8}{19} \cdot \frac{19}{72} = \frac{8 \cdot 19}{19 \cdot 72} = \frac{8}{72} = \frac{1}{9}\) 4) \(\frac{44}{65} \cdot \frac{25}{77} = \frac{44 \cdot 25}{65 \cdot 77} = \frac{4 \cdot 5}{13 \cdot 7} = \frac{20}{91}\) Ответ: 1) \(\frac{18}{35}\); 2) \(\frac{1}{18}\); 3) \(\frac{1}{9}\); 4) \(\frac{20}{91}\)