橘子有:240x(5/6)x(4/5)=160箱.
长方体的高是:12x(5/6)x(1/2)=5分米.
[(2/7)+(5/7)]x(4/5)=4/5.
125x[(3/5)--(7/25)]=40.
10除以(5/9)+(1/6)x4=18又3分之2.
(1/6)x(2/3)除以[(4/5)--(8/15)]=5/12.
(7/9)除以(11/5)+(2/9)x(5/11)=5/11.
(1/12+1/2--7/12)除以(1/7)=0.
(5/8)x(3/5)x(4/9)=1/6.
9除以[1除以(3/8)]=27/3.