Ответ:

  1. а) \(\frac{3}{8}\cdot\frac{9}{11}=\frac{27}{88}\).
  2. б) \(\frac{22}{35}\cdot\frac{21}{44}=\frac{3}{10}\).
  3. в) \(5\frac{3}{5}\cdot\frac{4}{21}=\frac{28}{5}\cdot\frac{4}{21}=\frac{16}{15}=1\frac{1}{15}\).
  4. г) \(9\frac{3}{7}\cdot1\frac{3}{11}=\frac{66}{7}\cdot\frac{14}{11}=12\).
  5. д) \(1\frac{1}{15}\cdot\frac{5}{16}=\frac{16}{15}\cdot\frac{5}{16}=\frac{1}{3}\).
  6. е) \(\frac{7}{11}\cdot2\frac{5}{14}=\frac{7}{11}\cdot\frac{33}{14}=\frac{3}{2}=1\frac{1}{2}\).

Ответ: а) \(\frac{27}{88}\); б) \(\frac{3}{10}\); в) \(1\frac{1}{15}\); г) 12; д) \(\frac{1}{3}\); е) \(1\frac{1}{2}\).