数学简便运算(做得好追加100分)

问题描述:

数学简便运算(做得好追加100分)
0.03*(1.34-0.84)
1.25*1.7*0.8
8.54-5.98
39/(0.5*3.9)
53.4/0.25/0.4
0.75+0.25/0.1
42/3.5
(7.2-0.4)*25
3.6-36*0.8
3.75*0.5+6.25/2
6.3*2.1-0.63

0.03*(1.34-0.84) =0.03*0.5=0.0151.25*1.7*0.8 =1.7*(1.25*0.8)=1.7*1=1.78.54-5.98 =8.54-(6-0.02)=8.54-6+0.02=2.5639/(0.5*3.9) =39/3.9*2=10*2=2053.4/0.25/0.4 上下*2.5=53.4*10/0.4*2.5=5340.75+0.25/0.1 =0...