(1)-(2m-3)=(2)n-3(4-2m)=(3)16a-8(3b+4c)=(4)t+2/3(12-9v)=(5)-(5m+n)-7(a-3b)=(6)-1/2(x+y)+1/4(p+q)=(7)-8(3a-2ab+4)=(8)4(m+p)-7(n-2q)=

问题描述:

(1)-(2m-3)=
(2)n-3(4-2m)=
(3)16a-8(3b+4c)=
(4)t+2/3(12-9v)=
(5)-(5m+n)-7(a-3b)=
(6)-1/2(x+y)+1/4(p+q)=
(7)-8(3a-2ab+4)=
(8)4(m+p)-7(n-2q)=

2m+3
n-12+6m
16a-24b-32c
t+8-6v
-5m-n-7a+21b
-1/2x-1/2y+1/4p+1/4q
-24a+16ab-32
4m+4p-7n+14q

1 3+2m
2 n-12+6m
3 16a-24b-32c
4 9-6v
5 -5m-n-7a+21b
6 -1/2x-1/2y+1/4p+1/4q
7 -24a+16ab-32
8 4m+4p-7n+14q

1. 3-2m
2. n-12+6m
3. 16a-24b-32c
4. t+8-6v
5. -5m-n-7a+21b
6. -1/2x-1/2y+1/4p+1/4q
7. -24a+16ab-32
8. 4m+4p-7n+14q

正负数不懂?

(1)-(2m-3)=-2m+3(2)n-3(4-2m)=n-12+6m(3)16a-8(3b+4c)=16a-24b-32c(4)t+2/3(12-9v)=t+8-6v(5)-(5m+n)-7(a-3b)=-5m-n-7a+21b(6)-1/2(x+y)+1/4(p+q)=-½x-½y+¼p+¼q(7...

1.3-2m
2.7m-12
3.16a-24b-32c
4.t+8-6v
5.-5m-n-7a+21b
6.-1/2x-1/2y+1/4p+1/4q
7.-24a+16ab-32
8.4m+4p-7n+14q
.....= =。