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4分之3Ⅹ0.2+75%╳0.7+0.75能简要简

4分之3Ⅹ0.2+75%╳0.7+0.75能简要简 =0.75×(0.2+0.7+1) =0.75×1.9 =0.75×2-0.75×0.1 =1.5-0.075 =1.425

(1)(66-32×1.2)÷0.25,=(66-38.4)÷0.25,=27.6÷0.25,=110.4,(2)10×34+17×75%-7×0.75,=10×0.75+17×0.75-7×0.75,=(10+17-7)×0.75,=20×0.75,=15,(3)0.25×[515×(3-2.5×78)],=0.25×[515×(3-3516)],=0.25×[515×1316],=14×26...

“0.7 0.75”这个是什么意思啊???

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