用简便方法计算下面各题,急,4-9/15÷9/5-2/3(28+2/7×7/8)×1/412×(2/11-1/12)×115/6+9/8×1/6×8/95-(13/5×5/26+1/4)(3/8+1/27)×8+19/27

问题描述:

用简便方法计算下面各题,急,
4-9/15÷9/5-2/3
(28+2/7×7/8)×1/4
12×(2/11-1/12)×11
5/6+9/8×1/6×8/9
5-(13/5×5/26+1/4)
(3/8+1/27)×8+19/27

4-9/15÷9/5-2/3=4-9/15*5/9-2/3=4-5/15-2/3=4-(1/3+2/3)=4-1=3(28+2/7×7/8)×1/4=(28+1/4)*1/4=28*1/4+1/4*1/4=7+1/16=7又1/1612×(2/11-1/12)×11=12*2/11*11-12*1/12*11=24-11=135/6+9/8×1/6×8/9=5/6+1/6=...