6 10 17 11 --- --- --- --- 23 —21 + 23 ---21急,五年级分数加减法,
问题描述:
6 10 17 11 --- --- --- --- 23 —21 + 23 ---21
急,五年级分数加减法,
答
6 10 17 11 --- --- --- --- 23 —21 + 23 ---21
急,五年级分数加减法,