www.zhnq.net > 0.8乘0.25乘0.4乘12.5的简便方法

0.8乘0.25乘0.4乘12.5的简便方法

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

先用整数乘,然后再前进小数点.0.8*0.25*0.4*12.5=18*25*4*125=100000,0.8、0.25、0.4、12.5后面总共是五位小数点,100000前进五位小数点就是1.所以结果都是1.

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

(0.8*12.5)*(0.4*0.25)

0.8乘0.25乘0.4乘12.5简便运算;0.8*0.25*0.4*12.5=(0.4*0.25)*(0.8*12.5)=0.1*10=4

0.8*0.25*0.4*12.5=(0.8x12.5)x(0.25x0.4)=10x0.1=1

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

0.8乘0.25乘0.4乘12.5=(0.8乘12.5)乘(0.25乘0.4)=100*0.1=10

0.8*=0.8*(0.25*0.4)+1.25=0.8*0.1+1.25=0.08+1.25=1.33我觉得这道题应该是这样的:0.8*0.25*0.4*12.5 =(0.8*12.5)*(0.25*0.04)=1*0.01=0.01

=(0.25乘0.4)乘(0.8乘12.5)=0.1乘1=0.1

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