4.75*3 又5/2-3.4+6.25*3又5/2简便算法_数学解答

4.75*3 又5/2-3.4+6.25*3又5/2简便算法

人气：394 ℃　时间：2020-04-10 17:59:24

解答

4.75×3 又5/2-3.4+6.25×3又5/2
=（4.75+6.25）×3又5/2-3.4
= 11×11/2-3.4
= 121/2-3.4
= 60.5-3.4
= 57.1