给我出21到计算题,14道应用题,关于分数乘除法的,

1. 2-(1/5+1/3)
(3/4-3/5)÷7/10
(2/3+2/9)÷20/21
1-5/14÷5/7
1/4÷(2/3+1/2)*4/5
[8/15-(4/5-3/10]*15/14 [(5.84-3.9)/0.4+0.15]*0.92
2.4.38/(36.94+34.3*0.2)
3.(284+16)*(512-8208/18)
4.5.4/[2.6*(3.7-2.9)+0.62]
5.[(7.1-5.6)*0.9-1.15]/2.5
6.32.52-(6+9.728/3.2)*2.5
7.5.8*(3.87-0.13)+4.2*3.7
8.8/9*[15/16*(7/16-1/4)/1/2]
9.[5 1/2-1.04*(1 2/3+5/6)]/2.9
10.6 3/7 /3/7-[(7-0.5)*1/4]应用题：http://www.***.com/p-1863068781465.html