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脱式计算;1乘1/100除以1/2000乘1/10 = = = = ??...

0.01 解析: 1÷100=0.01 1÷10=0.1

(1/10+1/4)x1/7 =(2/20+5/20)x1/7 =7/20x1/7 =1/20 希望能帮到你

3.86×10.1 =3.86×(10+0.1) =3.86×10+3.86×0.1 =38.6+0.386 =38.986

原式 =10.1x99-9.9 =10.1x99-0.1x99 =(10.1-0.1)x99 =10x99 =990 供参考。

(1/3+1/5)x150=(5/15+3/15)x150=8/15x150=8x30=240

10.1x0.99 =(10+0.1)×0.99 =10×0.99+0.1×0.99 =9.9+0.099 =9.999

10.1*8.7 =(10+0.1)*8.7 =10*8.7+0.1*8.7 =87+0.87 =87.87

5.2×10.1 =5.2×10+5.2×0.1 =52+0.52 =52.52

=8.4*(10+0.1) =8.4*10+8.4*0.1 =84+0.84 =84.84

0.8×1.2÷0.8×1.2 =(0.8÷0.8)×(1.2×1.2) =1×1.44 =1.44

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