1.去括号。
﹣(5m+n)-7(a-3b)
﹣1/2(x+y)+1/4(p+q)
- 8(3a-2ab+4)
2.化简下列各式
﹣2n-(3n—1)
- 3(2s —5)+6s
3(xy-2z)+(-xy+3z)
谢谢了
1.去括号。
﹣(5m+n)-7(a-3b)
﹣1/2(x+y)+1/4(p+q)
- 8(3a-2ab+4)
2.化简下列各式
﹣2n-(3n—1)
- 3(2s —5)+6s
3(xy-2z)+(-xy+3z)
谢谢了
1
-5m-n-7a+21b
-1/2x-1/2y+1/4p+1/4q
-24a+16ab-32
2.
-5n+1
-6s+15+6s=15
3xy-6z-xy+3z=2xy-3z
1
-5m-n-7a+21b
-1/2x-1/2y+1/4p+1/4q
-24a+16ab-32
2.
-5n+1
-6s+15+6s=15
3xy-6z-xy+3z=2xy-3z
﹣(5m+n)-7(a-3b)=-5m-n-7a+21b
﹣1/2(x+y)+1/4(p+q)=-1/2x-1/2y+1/4p+1/4q
- 8(3a-2ab+4)=-24a+16ab-32
﹣2n-(3n—1)=-2n-3n+1=-5n-1
- 3(2s —5)+6s=-6s+15
3(xy-2z)+(-xy+3z)=3xy-6z-xy+3z=2xy-3z
1.
-5m-n-7a+21b
-1/2x-1/2y+1/4p+1/4q
-24a+16ab-32
2.
1-5n
15
2xy-z
1
-5m-n-7a+21b
-1/2x-1/2y+1/4p+1/4q
-24a+16ab-32
2.
1.去括号。
﹣(5m+n)-7(a-3b)=-5m-n-7a+21b
﹣1/2(x+y)+1/4(p+q)=-1/2x-1/2y+1/4p+1/4q
- 8(3a-2ab+4)=-24a+16ab-32
2.化简下列各式
﹣2n-(3n—1)=-2n-3n+1=-5n-1
- 3(2s —5)+6s=-6s+15
3(xy-2z)+(-xy+3z)=3xy-6z-xy+3z=2xy-3z