www.5129.net > 40x0.8x0.25x12.5简便方法计算

40x0.8x0.25x12.5简便方法计算

0.8×0.25×0.4×12.5 =(0.4×12.5)×(0.25×0.4) =10×0.1 =1

解: 0.8x0.25x0.4x12.5 =(0.8x12.5)x(0.4x0.25) (乘法交换律) =10x0.1 =1 由于含有8与125相乘,4与25都属于特殊数值相乘,可以利用乘法交换律,重新组合,便于计算。

首先用我们的乘法交换律=3.4x1.5x7=5.1x7=35.7

12x(二分之一加三分之一减四分之一)4x0.8x0.25x12.5 =(6+4-3)x1x10 =7x10 =70 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

=(0.4x0.25)x(0.08x12.5)x(0.2x0.5) =0.1x0.1x0.1 =0.001

12.5x27x0.8 =(12.5×0.8)x27 =10x27 =270

12.5x888 =12.5×8×111 =100×111 =11100 12.5×888 =12.5×(800+80+8) =12.5×800+12.5×80+12.5x8 =10000+1000+100 =11100

5.28+12.5×4.12×0.8+4.72 =(5.28+4.72)+12.5×0.8×4.12 =10+10×4.12 =10+41.2 =51.2

12.5X(8+0.8) =12.5x8+12.5x0.8 =100+10 =110 请采纳正确答案,你们只提问,不采纳正确答案,回答都没有劲!谢谢管理员推荐采纳!! 朋友,请【采纳答案】,您的采纳是我答题的动力,如果没有明白,请追问。谢谢。

0.125x500x0.2x8 =(0.125×8)×(500×0.2) =1×100 =100 (291-38x3.5-35.5)/3.5 =(291-35.5)/3.5-38×3.5/3.5 =255.5/3.5-38 =73-38 =35 12.5x0.56x0.4x0.8x250 =(12.5×0.8)×(0.4×250)×0.56 =10×100×0.56 =560

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