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1.2÷0.25怎样写简便计算

1.2÷0.25 =1.2÷1/4 =1.2x4 =4.8

2.1÷0.25×4 =2.1×4÷0.25 =2.1×4×4 =8.4×4 =33.6

28.6x10.1-2.86 解:简便计算 =28.6x10.1-28.6x0.1 =28.6x(10.1-0.1) 乘法分配律 =28.6x10 =286 4.12÷0.25-0.12×4 解:简便计算 =4.12x4-0.12x4 =4x(4.12-0.12) 乘法分配律 =4x4 =16 祝学习进步。

简便算法如下: 方法1: (7.1*4)÷(0.25*4)=28.4÷1=28.4 方法2: 710/25=28.4 简便算法的公式: 1/[n*(n+1)*(n+2)]=(1/n*(n+1)-1/(n+1)(n+2)]/2 1/ (n*(n+1)) = 1/n - 1/(n+1) 涉及简便算法的题目: 1/1×2+1/2×3+1/3×4+····+1/2005×2006 解:...

263÷0.25×1.2 =263x4x1.2 =1052x1.2 =1262.4

3.48÷0.3÷4+12.8÷4 =1.16÷4+12.8÷4 =(1.16+12.8)÷4 =13.96÷4 =3.49

就是这样,求采纳

1/3+(0.75+0.25÷2/3)的简便算法。 1/3+(0.75+0.25÷2/3) =1/3+3/4+1/4*3/2 =1/3+3/4+3/8 =8/24+18/24+9/24 =35/24

1.72×4 4.28÷0.25简便计算 1.72×4 4.28÷0.25 =4*(1.72+4.28) =4*6 =24

1/3十3/4+1/4×3/2 =1+3/8 =1又3/8

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