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12.5×4.8的简便运算.

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

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

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

12.5x103 =12.5x(100+3) =12.5x100+12.5×3 =1250+37.5 =1287.5

这样子

12.5X(0.2x8)

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

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