小括号2⼀3-2⼀15小括号成6-1⼀5能不能用简便方法算我能怎么算不能怎么算?

2025-04-09 06:11:03
推荐回答(1个)
回答1:

(2/3-2/15)×6-1/5
=2/3×6-2/15×6-1/5
=4-4/5-1/5
=4-(4/5+1/5)
=4-1
=3