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脱式计算:0.75÷0.0025 (8+0.8)×0.125 3.45×2.8+3.45

(8+0.8)×0.125 =8*0.125+0.8*0.125 =1-0.1 =0.9

(1)3.5×0.8+7.5×0.8-80%,=(3.5+7.5-1)×0.8,=10×0.8,=8

1、0.125×96 解析:此题先利用减法分配律把96转换成(100-4),再利用乘法结合律,使得运

=0.125×8+2.5×8=1+20=21

(1)[9.2+0.8×(9-7.75)]÷0.4=[9.2+0.8×1.25]÷4=[9.2+1]

脱式计算,能简便的简便: 7又5/8×1/8+3又3/8÷8+0.125 =7又5/8×1/8

(1)13.7×0.125×8,=13.7×(0.125×8),=13.7×1,=13.7;(2)0

一365/68~x2587

1.25×8+0.8×7 =10+5.6 =15.6

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