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1.6乘2.5的简便计算

1.6×2.5 =4×0.4×2.5 =4×(0.4×2.5) =4×1 =4

2.5乘1.6简便算法这样做: 2.5x1.6 =2.5x(4x0.4) =(2.5x4)x0.4 =10x0.4 =4

(1.6 1.6 1.6 1.6)*2.5=(1.6*4)*2.5=1.6*(4*2.5)=1.6*10=16 一般看到25什么的就想办法找4或4的倍数啦~ 希望帮到你~

2.5×1.6 =4×(0.4×2.5) =4×1 =4

25x1.6 =25x4x0.4 =100x0.4 =40

30/2.5+1.6*2.5 =30*0.4/(2.5*0.4) +2.5*1+2.5*0.6 =12+2.5+1.3 =12+3.8 =15.8

把2.5化为分数5/2 带入就很容易了啊 望采纳

2.5*3.8*1.6简便运算 解答 2.5×3.8×1.6 =2.5×4×0.4×3.8 =10×0.4×3.8 =4×3.8 =15.2

原式 =(4x0.4)x2.5x3.9 =(4x2.5)x(0.4x3.9) =10x1.56 =15.6 供参考。

(12.5+2.5)×1.6 =12.5×1.6+2.5×1.6 =12.5×8×0.2+2.5×4×0.4 =100×0.2+10×0.4 =20+4 =24

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