180. Найди значения дробей: а) 2,7/3,6; б) (5 1/7)/(3 3/14); в) (7,2·2,8)/(3,5·0,64); г) ((1 1/3)·(2 3/11)·(3 1/2))/((1/2)·(4 1/6)·(3 9/11)); д) (5,6·3 1/3·0,63)/(4,9·0,018·5 1/3); е) ((1 1/3)·(2 2/3)·0,36)/(0,6·2 1/4·1 1/3); ж) (0,27·1 5/7·4,8·0,3)/(0,032·0,54·3 4/7·1,8); з) (0,38·0,17·2 2/15·2,7)/(5,1·3 4/5·0,064).

1. а) \(\dfrac{2,7}{3,6}=\dfrac{27}{36}=\dfrac34\).
2. б) \(\dfrac{5\frac17}{3\frac3{14}}=\dfrac{36}{7}:\dfrac{45}{14}=\dfrac{36}{7}\cdot\dfrac{14}{45}=\dfrac85=1,6\).
3. в) \(\dfrac{7,2\cdot2,8}{3,5\cdot0,64}=\dfrac{20,16}{2,24}=9\).
4. г) \(\dfrac{1\frac13\cdot2\frac3{11}\cdot3\frac12}{\frac12\cdot4\frac16\cdot3\frac9{11}}=\dfrac{\frac43\cdot\frac{25}{11}\cdot\frac72}{\frac12\cdot\frac{25}{6}\cdot\frac{42}{11}}=\dfrac43\).
5. д) \(\dfrac{5,6\cdot3\frac13\cdot0,63}{4,9\cdot0,018\cdot5\frac13}=\dfrac{5,6}{4,9}\cdot\dfrac{10}{16}\cdot\dfrac{0,63}{0,018}=\dfrac87\cdot\dfrac58\cdot35=25\).
6. е) \(\dfrac{1\frac13\cdot2\frac23\cdot0,36}{0,6\cdot2\frac14\cdot1\frac13}=\dfrac{\frac83\cdot0,36}{0,6\cdot\frac94}=\dfrac{32}{45}\).
7. ж) \(\dfrac{0,27\cdot1\frac57\cdot4,8\cdot0,3}{0,032\cdot0,54\cdot3\frac47\cdot1,8}=6\).
8. з) \(\dfrac{0,38\cdot0,17\cdot2\frac2{15}\cdot2,7}{5,1\cdot3\frac45\cdot0,064}=\dfrac3{10}=0,3\).

Ответ: а) \(\frac34\); б) \(1,6\); в) \(9\); г) \(\frac43\); д) \(25\); е) \(\frac{32}{45}\); ж) \(6\); з) \(0,3\).