6.25*2.7+6.5*1.25的简便算法_数学解答

6.25*2.7+6.5*1.25的简便算法

人气：318 ℃　时间：2020-05-10 15:25:19

解答

6.25×2.7+6.5×1.25
=1.25×5×2.7+1.25×6.5
=1.25×13.5+1.25×6.5
=1.25×(13.5+6.5)
=1.25×20
=25