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7.1÷0.25的数式计算

被除数和除数同时扩大100倍,商不变

=7.1÷(0.25×4÷4)=7.1÷(1÷4)=7.1×4=28.4

28.4算吧

7.1÷0.25 =(7.1×4)÷(0.25×4) =28.4÷1 =28.4

原式=7.1/(2.5*0.4)=7.1

(1)19.8×0.54÷0.081,=10.692÷0.081,=132;(2)0.25×32×1.25,=0.25×(4×8)×1.25,=(0.25×4)×(1.25×8),=1×10,=10;(3)1.89÷0.54-7.1÷2.5,=3.5-2.84,=0.66;(4)0.25×26×40,=0.25×40×26,=10×26,=260;(5)8.7×99,=8.7×(10...

1.25×1.7×8÷1.7 =1.25×8x(1.7÷1.7) =10x1 =10

【7.1-(1.56+1.54)】÷2.5 =【7.1-3.1】÷2.5 =4÷2.5 =1.6

根据题意可得:(1)2.65×1.7+1.35×1.7,=(2.65+1.35)×1.7,=4×1.7,=6.8;(2)23.4÷7.8-2.1,=3-2.1,=0.9;(3)0.25×0.8×4×0.125,=(0.25×4)×(0.8×0.125),=1×0.1,=0.1.

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