几道小学数学简便计算题

7.51*0.25*0.4 = 7.51*(0.25*0.4) = 7.51*0.1 = 0.751
(9-0.6*3.2）/1.5 = 9/1.5-(0.6/1.5)*3.2 = 6-0.4*3.2 = 6-1.28 = 4.72
3.5/0.25/0.4 = 3.5/(0.25*0.4) = 3.5/0.1 = 35
20.5-（3.64+2.8）/0.4 = 20.5-(9.1+7) = 20.5-16.1 = 4.4
3.06/[1.8*（2.41-1.91)] = 3.06/(1.8*0.5) = 3.06/0.9 = 3.4

7.51*(0.25*0.4)=7.51*0.1=0.751
4.72
4.4
3.06/(1.8*0.5)=3.4

0.25*0.4=0.1*7.51=0.751
不高兴算了

第一题：7.51*1/4*0.4先算后两个是0.1再乘以7.51就等于0.751

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