(1)-2n-(3n-1)(2)-3(2s-5)+6s(3)3(-ab+2a)-(3a-b)(4)3(xy-2z)+(-
(1)-2n-(3n-1)
(2)-3(2s-5)+6s
(3)3(-ab+2a)-(3a-b)
(4)3(xy-2z)+(-xy+3z)
(5)-4(pq+pr)+(4pq+pr)
今晚必须做完快,
(2)-3(2s-5)+6s
(3)3(-ab+2a)-(3a-b)
(4)3(xy-2z)+(-xy+3z)
(5)-4(pq+pr)+(4pq+pr)
今晚必须做完快,
赞 qilimazaluo 种子
共回答了13个问题采纳率：76.9% 举报
(1)-2n-(3n-1)
=-2n-3n+1
=-5n+1
(2)-3(2s-5)+6s
=-6s+15+6s
=15
(3)3(-ab+2a)-(3a-b)
=-3ab+6a-3a+b
=-3ab+3a+b
(4)3(xy-2z)+(-xy+3z)
=3xy-6z-xy+3z
=2xy-3z
(5)-4(pq+pr)+(4pq+pr)
=-4pq-4pr+4pq+pr
=-3p
=-2n-3n+1
=-5n+1
(2)-3(2s-5)+6s
=-6s+15+6s
=15
(3)3(-ab+2a)-(3a-b)
=-3ab+6a-3a+b
=-3ab+3a+b
(4)3(xy-2z)+(-xy+3z)
=3xy-6z-xy+3z
=2xy-3z
(5)-4(pq+pr)+(4pq+pr)
=-4pq-4pr+4pq+pr
=-3p
1年前
1
可能相似的问题
-
1年前1个回答
你能帮帮他们吗