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4.25乘0.75加75%加4.75乘四分之三

4.25×0.75+75%+4.75×3/4 =4.25×3/4+3/4+4.75×3/4 =3/4

因为0.75=75%=4分之3 原式=0.75×(4.25+1+4.75)=0.75×10=7.5

4.75是4又4分之3,0.375就是8分之3,1.36就是1又100分之36,化简1又25分之9,

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