Ответ:
- \[\frac{1.1\cdot3.2\cdot7.8}{3.9\cdot4.4\cdot6.4}=\frac{1.1}{4.4}\cdot\frac{3.2}{6.4}\cdot\frac{7.8}{3.9}=\frac14\cdot\frac12\cdot2=\frac14.\]
- \[\frac{6.3\cdot3.4\cdot1.6\cdot1.5}{4.5\cdot0.9\cdot3.4\cdot4.8}=\frac{6.3}{4.5}\cdot\frac{1.6}{4.8}\cdot\frac{1.5}{0.9}=1.4\cdot\frac13\cdot\frac53=\frac79.\]
Ответ: 1) \(\frac14\); 2) \(\frac79\).
