一减括号1⼀5+2⼀3括号等于多少?

2025-04-01 11:11:46
推荐回答(2个)
回答1:

一减括号1/5+2/3括号等于2/15

回答2:

1-(1/5+2/3)
=1-1/5-2/3
=15/15-3/15-10/15
=(15-3-10)/15
=2/15