3.5*5/4+12.5*13/20简便计算_数学解答

3.5*5/4+12.5*13/20简便计算

人气：335 ℃　时间：2020-01-30 14:19:17

解答

3.5*5/4+12.5*13/20
=3.5x1.25+12.5x0.65
=3.5x1.25+6.5x1.25
=(3.5+6.5)x1.25
=10x1.25
=12.5