which eqiuvalent fraction would you have to use in order to add 3/5 to 21/25?

分类: 作业答案 • 2021-12-29 10:21:58

问题描述：

答

这个题的意思是：
用什么分数加上3/5结果是21/25
也就是用21/25-3/5
=(21-15)/25
=6/25