Ответ:
- \(\frac{5}{7}\cdot\frac{7}{9}=\frac{35}{63}=\frac{5}{9}\).
- \(\frac{1}{20}\cdot\frac{17}{30}=\frac{17}{600}\).
- \(\frac{2}{9}\cdot\frac{1}{6}=\frac{2}{54}=\frac{1}{27}\).
- \(\frac{5}{6}\cdot\frac{3}{4}=\frac{15}{24}=\frac{5}{8}\).
- \(\frac{8}{38}\cdot\frac{4}{19}=\frac{32}{722}=\frac{16}{361}\).
- \(\frac{7}{9}\cdot\frac{8}{11}=\frac{56}{99}\).
- \(\frac{8}{25}\cdot\frac{7}{20}=\frac{56}{500}=\frac{14}{125}\).
- \(\frac{5}{12}\cdot\frac{4}{5}=\frac{20}{60}=\frac{1}{3}\).
Ответ: 1) \(\frac{5}{9}\); 2) \(\frac{17}{600}\); 3) \(\frac{1}{27}\); 4) \(\frac{5}{8}\); 5) \(\frac{16}{361}\); 6) \(\frac{56}{99}\); 7) \(\frac{14}{125}\); 8) \(\frac{1}{3}\).
