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    21.15-4.25除以1.7的简便方法

        发布时间:2019-07-27

        7.25除以4+2.7乘以0.25
        = 7.25除以4+2.7除以4旦互测就爻脚诧协超茅
        = (7.25+2.7)除以4
        = 9.95÷4
        =10÷4-0.05÷4
        =2.5-0.0125
        =2.4875

        回复:

        21
        =4又20/21
        =15/7×28/21
        =4+20/15×1又5/21
        =4+4×5/21
        =4×1又5ǘ又1/7÷15/28×1又5/

        回复:

        7.25÷4+2.7*0.25
        =7.25*0.25+2.7*0.25
        =(旦互测就爻脚诧协超茅7.25+2.7)*0.25
        =9.95*0.25
        =(10-0.05)*0.25
        =2.5-0.0125
        =2.4875

        回复:

        7.25÷4+2.7*0.25 =7.25*0.25+2.7*0.25 =(7.25+2.7)*0.25 =9.95*0.25 =(10-0.05)*0.25 =2.5-0.0125 =2.4875

        回复:

        2又1/7÷15/28×1又5/21 =15/7

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