www.5129.net > 40x0.8x0.25x12.5简便方法计算

40x0.8x0.25x12.5简便方法计算

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。

(12.5X46.2 +53.8X12.5)x0.8 =(577.5+672.5)x0.8 =1250×0.8 =1000

47.5x12.8+7.2ⅹ47.5 提取公因数47.5 =47.5x(12.8+7.2) =47.5x20 =950

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

解:12.5-12.5×0.2= 12.5×1-12.5×0.2 =12.5×(1-0.2) =12.5×0.8 =10

12.5*8*0.04*0.5=10*0.5*0.04=0.2

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

1、61.876,2、=12.5*8+12.5*0.08=101,3、=65*9.9+65*0.1=650

16x12.5x4.3 =8x12.5x2x4.3 =(8x12.5)x(2x4.3) =100x8.6 =860 希望帮到你 望采纳 谢谢 加油~

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