6.35×8＋1.7的简便方法

分类: 作业答案 • 2021-12-24 16:37:58

问题描述：

6.35×8＋1.7的简便方法

答

6.35×8＋1.7
=6.35*(10-2)+1.7
=6.35*10-6.35*2+1.7
=63.5-12.7+1.7
=63.5-(12.7-1.7)
=63.5-11
=52.5