(5⼀12-3⼀7)-(4⼀7-7⼀14)=?

2025-04-13 07:15:41
推荐回答(1个)
回答1:

(5/12-3/7)-(4/7-7/14)
=5/12-3/7-4/7+7/14
=(5/12+7/14)-(3/7+4/7)
=11/12-1
=-1/12