5分之4减括号里16分之13减16分之5加四分之3减便

2025-06-27 16:53:39
推荐回答(1个)
回答1:

4/5-(13/16-5/16+3/4)
=4/5-13/16+5/16-3/4
=4/5-1/2-3/4
=4/5-5/4
=-9/25