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4.8×12.5的简便运算

2.1乘12.5乘4.8,该怎么简便运算的

2.1×(12.5×4)×1.2=2.1×60=126

12.5x4.8 =12.5x8x0.6 =100x0.6 =60

4.8×12.5=(5-2)×12.5=5×12.5-2×12.5=62.5-25=37.5

2.5*4.8*12.5 =2.5*(0.6*8)*12.5 =2.5*(8*12.5)*0.6 =2.5*100*0.6 =25*6 =150

求“0.8 x 0.25 x 0.4 x 12.5 =”的简便运算 运算思路:先按照相乘化整数的方法,0.8乘以12.5等于10,0.4乘以0.25等于0.1,再计算10乘以0.1等于1。 0.8 X 0.25 X 0.4 X 12.5 = ( 0.8 X 12.5 ) X ( 0.25 X 0.4) = 10 X 0.1 = 1

简便运算12.5×20.4+12.5×9.6-1.25=12.5×(20.4+9.6)-1.25=12.5×40-1.25=500-1.25=498.75

17.5+3.2+4.8+12.5 =(17.5+12.5)+(3.2+4.8) =30+8 =38 祝天天向上。

12.5×32 =12.5*8*4 =100*4 =400 将32拆成8*4,即可简便运算

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