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3.45乘0.79加6.55乘0.21怎么简便计算

3.45乘0.79加6.55乘0.21 =3.45*0.79+(3.1+3.45)*0.21 =...

3.45加4.6加6.55减4.6简便计算。 解:运用结合律, 原式=(3.45+6.55)+(4....

6.55x4.5十34.5x0.45 =6.55X4.5+3.45x0.45 =(6.55+3.45...

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