3.9*0.309/0.26的简便算法

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3.9*0.309/0.26的简便算法3.9*0.309/0.26的简便算法3.9*0.309/0.26的简便算法3.9*0.309/0.26=39/26*3.09=3/2*3.09=4.6353.9

3.9*0.309/0.26的简便算法
3.9*0.309/0.26的简便算法

3.9*0.309/0.26的简便算法
3.9*0.309/0.26
=39/26*3.09
=3/2*3.09
=4.635

3.9*0.309/0.26
=39*3.09/26
=3*13*3.09/2*13
=9.27/2
=4.635