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

问题描述:

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

太多了

8x-(-3x-5) =8x+3x+5=11x+5
(3x-1)+(2-5x) =3x-1+2-5x=1-2x
(-4y+3)-(-5y-2)=-4y+3+5y+2=y+5
3x+1-2(4-x)=3x+1-8+2x=5x-7