Ответ:
а) \(2\cdot\left(\frac{14}{15}:\frac{2}{3}\right)=2\cdot\frac{14}{15}\cdot\frac{3}{2}=\frac{14}{5}\).
б) \(\frac{12}{11}:\frac{3}{4}\cdot\frac{11}{24}=\frac{12}{11}\cdot\frac{4}{3}\cdot\frac{11}{24}=\frac{2}{3}\).
в) \(\frac{1}{2}\cdot\frac{2}{3}\cdot\frac{3}{4}\cdot\frac{4}{5}=\frac{1}{5}\).
Ответ: а) \(\frac{14}{5}\); б) \(\frac{2}{3}\); в) \(\frac{1}{5}\).
