7.53/4+0.751/2-0.75简便算

分类: 作业答案 • 2022-01-04 12:28:49

问题描述：

7.5*3/4+0.75*1/2-0.75简便算

答

7.5×3/4+0.75×1/2-0.75
=7.5×3/4+3/4×0.5-3/4
=(7.5+0.5-1)×3/4
=7×3/4
=21/4

7.5*3/4+0.75*1/2-0.75简便算