2. Найдите значение выражения 1) \(\frac{9}{5} \cdot \frac{2}{3}\) 2) \(\frac{15}{2} \cdot \frac{7}{5}\) 3) \(\frac{6}{5} : \frac{4}{11}\) 4) \(\frac{21}{2} : \frac{3}{5}\)

1) \(\frac{9}{5} \cdot \frac{2}{3} = \frac{9 \cdot 2}{5 \cdot 3} = \frac{3 \cdot 3 \cdot 2}{5 \cdot 3} = \frac{6}{5} = 1 \frac{1}{5}\) 2) \(\frac{15}{2} \cdot \frac{7}{5} = \frac{15 \cdot 7}{2 \cdot 5} = \frac{3 \cdot 5 \cdot 7}{2 \cdot 5} = \frac{21}{2} = 10 \frac{1}{2}\) 3) \(\frac{6}{5} : \frac{4}{11} = \frac{6}{5} \cdot \frac{11}{4} = \frac{6 \cdot 11}{5 \cdot 4} = \frac{2 \cdot 3 \cdot 11}{5 \cdot 2 \cdot 2} = \frac{33}{10} = 3 \frac{3}{10}\) 4) \(\frac{21}{2} : \frac{3}{5} = \frac{21}{2} \cdot \frac{5}{3} = \frac{21 \cdot 5}{2 \cdot 3} = \frac{3 \cdot 7 \cdot 5}{2 \cdot 3} = \frac{35}{2} = 17 \frac{1}{2}\) Ответ: 1) \(1 \frac{1}{5}\); 2) \(10 \frac{1}{2}\); 3) \(3 \frac{3}{10}\); 4) \(17 \frac{1}{2}\)