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3.2x1.25x2.5简便计算

3.2分成8乘0.4,用1.25乘8,再用4乘2.5,算出答案,就可以了!

解:采用拆分法和结合律, 原式=3.2x1.25x2.5 =0.8x4x1.25x2.5 =(2.5x4)x(1.25x0.8) =10x1 =10

=(2.5×4)×(0.8×1.25) =10×1 =10

2.5x3.2x1.25 =(2.5x0.4)x(8x1.25) =1x10 =10

2.5x3.2x1.25 =(2.5x4)x(0.8x1.25) =10x1 =10

3.2x1.25 =0.4x8x1.25 =0.4x10 =4 朋友,请及时采纳正确答案,下次还可能帮到您哦,您采纳正确答案,您也可以得到财富值,谢谢。

0.25X3.2x1.25 =(0.25×4)×(0.8×1.25) =1×1 =1

1.25X3.2的简便运算 1.25*3.2 =1.25*8*0.4 =10*0.4 =4

=0.25×(4×0.8)×1.25 =(0.25×4)×(0.8×1.25) =1×1 =1

1.25x3.2x0.25= 1.25*0.88*4*0.25= 1*1=1 采纳吧

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