0.8×0.25×0.4×12.5怎么简算？ 0.8 0.25 0.4 12.5简便计算

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

0.8*0.25*0.4*12.5 =0.8*(0.25*0.4)*12.5 =0.8*0.1*12.5 =0.8*1.25 =4/5*5/4 =1

=(0.25乘0.4)乘(0.8乘12.5)=0.1乘1=0.1

0.8x0.25 x0.4 x12.5=(0.8x0.25) x(0.4 x12.5)=0.2x0.05=0.01

0.8*12.5x0.25*0.14=10x0.25*0.14=2.5*0.14

0.4*1.25*0.8*0.25应用( )和( )可使计算简便 0.4*1.25*0.8*0.25 =(0.4*0.25)*(1.25*0.8) =0.1*1 =0.1

12.5*4*0.25*0.5 =(12.5*0.8)*(4*0.25) =10*1 =10

(0.4+0.8)*0.25*0.125 =0.4*0.25*0.125+0.8*0.25*0.125 =0.1*0.125+0.1*0.25 =0.1*(0.125+0.25) =0.1*0.375 =0.0375

0.8*0.25*0.4*1.25 =(0.8*1.25)*(0.25*0.4) =1*0.1 =0.1

这样简便计算 (0.8*12.5)*(0.25*0.4)=10*0.1=1 望采纳,O(∩_∩)O谢谢 祝楼主学习进步

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