1)180/(1-1/3)=180/(2/3)=270 270*3/5=162
2)24/(5/8-4/8)=24/(1/8)=192
3)1/5/(9/10)*1/10=1/45
4)(150-10-35)/(3/4)=105/(3/4)=140
5)35/(1+1/8)=35/(9/8)=39.375 题有问题 应该是1/6 35/(1+1/6)=30
6)800/(1/4)*3/4=2400
7) (1-1/4)*1/3=1/4 80/(1-1/2)=160
8) 12/(1/2-4/9)=12/(1/18)=216