4分之三乘7加26分之21乘21分13怎么算不用解方程

2025-12-14 02:10:21
推荐回答(1个)
回答1:

3/4x7+21/26x13/21
=21/4+1/2
=21/4+2/4
=23/4
=5又 4分之3