2.5*4.8*0.125巧算_数学解答

2.5*4.8*0.125巧算

人气：449 ℃　时间：2020-02-24 04:53:17

解答

2.5*4.8*0.125
=2.5*(4+0.8)*0.125
=2.5*4*0.125+2.5*0.8*0.125
=10*0.125+2.5*0.1
=1.25+0.25
=1.5