括号里2⼀3-4⼀15x3⼀6括起来除以30⼀2等于多少?

2025-05-12 19:59:40
推荐回答(1个)
回答1:

(2/3-4/15×3/6)÷30/2
=(2/3-2/15)÷15
=(10/15-2/15)÷15
=8/15÷15
=8/225