2.5*(8-0.4)*12.5简算_数学解答

2.5*(8-0.4)*12.5简算

人气：199 ℃　时间：2020-04-13 12:30:37

解答

2.5*(8-0.4)*12.5
=2.5*12.5*(8-0.4)
=2.5*12.5*8-2.5*12.5*0.4
=2.5*(12.5*8)-(2.5*0.4)*12.5
=2.5*100-1*12.5
=250-12.5
=237.5