2a-b/3-a+2b/2-5a-2b/6 去括号并合并同类项(2a-b)/3-(a+2b)/2-(5a-2b)/6_数学解答

2a-b/3-a+2b/2-5a-2b/6 去括号并合并同类项
(2a-b)/3-(a+2b)/2-(5a-2b)/6

人气：312 ℃　时间：2019-10-10 06:38:48

解答

(2a-b)/3-(a+2b)/2-(5a-2b)/6
=2/3a-1/3b-1/2a-b-5/6a+1/3b
=(2/3-1/2-5/6)a+(-1/3-1/2+1/3)b
=-2/3a-1/2b