12.56*0.76*0.4*8*2.5的简便算法急,今天解决_数学解答

12.56*0.76*0.4*8*2.5的简便算法
急,今天解决

人气：291 ℃　时间：2020-05-13 16:58:19

解答

0.4*2.5=1
12.56*0.76*8
=(25/2+0.06)*(3/4+0.01)*8
=(25*0.12)*(3+0.04)
=75+0.36+1+0.0048
=76.3648