7又2⼀17加括号5⼀18减2⼀17括时如何简 算

2025-04-14 23:50:25
推荐回答(1个)
回答1:

7又2/17+5/18-2/17
=7又2/17-2/17+5/18
=7+5/18
=7又5/18