-2n-(3n-1) a-(5a-3b)+(2b-a) -3(2s-5)+6s 1-(2a-1)-(3a+3) 3(-ab+2a)-(3a-b) 14(abc-2a)+3(6a-2abc) 3(xy-2z)+(-xy+3z) -4(pq+pr)+(4pq+pr)
(要有過程)
-2n-(3n-1) a-(5a-3b)+(2b-a) -3(2s-5)+6s 1-(2a-1)-(3a+3) 3(-ab+2a)-(3a-b) 14(abc-2a)+3(6a-2abc) 3(xy-2z)+(-xy+3z) -4(pq+pr)+(4pq+pr)
(要有過程)
-2n-(3n-1) a-(5a-3b)+(2b-a) -3(2s-5)+6s 1-(2a-1)-(3a+3) 3(-ab+2a)-(3a-b) 14(abc-2a)+3(6a-2abc) 3(xy-2z)+(-xy+3z) -4(pq+pr)+(4pq+pr)
(要有過程)
℡鳳み筱ぽ殤 回答:1 人气:3 解决时间:2009-10-29 19:27 网友完善的答案1. -2n-(3n-1)
解:原式=-2n-3n+1
=-5n+1
2. a-(5a-3b)+(2b-a)
解:原式=a-5a+3b+2b-a
=-5a+5b
3. -3(2s-5)+6s
解:原式=-6s+15+6s
=15
4. 1-(2a-1)-(3a+3)
解:原式=1-2a+1-3a-3
=-1-5a
5. 3(-ab+2a)-(3a-b)
解:原式=(-3ab+6a)-3a+b
=-3ab+6a-3a+b
=-3ab+3a+b
6. 14(abc-2a)+3(6a-2abc)
解:原式=14 abc-28a+(18a-6abc)
=14abc-28a+18a-6abc
=8abc-10a
7. 3(xy-2z)+(-xy+3z)
解 原式=3xy-6z-xy+3z
=2xy-3z
8. -4(pq+pr)+(4pq+pr)
解:原式=-(4pq+4pr)+4pq+pr
=-4pq-4pr+4pq+4pr