初三数学化简题50道

Question

在线等回答 要求速度 奖励积分100 列入 （2a）^2... 被老师罚 要求答案一起

Answer 1

自己做，错了也是自己的,数学是要多做题的。
1.5a-{-3b+[6c-2a-(a-c)]}-[9a-(7b+c)]=______.
2.（X+2Y）^2-2（X-Y)(X+Y）+2Y（X-3Y）=______.
3.3ab-4ab+8ab-7ab+ab=______.
4.7x-(5x-5y)-y=______.
5.23a^3bc^2-15ab^2c+8abc-24a^3bc^2-8abc=______.
6.-7x^2+6x+13x^2-4x-5x^2=______.
7.2y+(-2y+5)-(3y+2)=______.
11.(2x^2-3xy+4y^2)+(x^2+2xy-3y^2)=______.
12.2a-(3a-2b+2)+(3a-4b-1)=______.
13.-6x^2-7x^2+15x^2-2x^2=______.
14.2x-(x+3y)-(-x-y)-(x-y)=______.
16.2x+2y-[3x-2(x-y)]=______.
17.5-(1-x)-1-(x-1)=______.
18.( )+(4xy+7x2-y2)=10x2-xy.
19.(4xy^2-2x^2y)-( )=x^3-2x^2y+4xy^2+y3.
21.已知A=x^3-2x^2+x-4,B=2x^3-5x+3,计算A+B=______.
22.已知A=x^3-2x^2+x-4,B=2x^3-5x+3,计算A-B=______.
23.若a=-0.2,b=0.5,代数式-(|a^2b|-|ab^2|)的值为______.
25.一个多项式减去3m^4-m^3-2m+5得-2m^4-3m^3-2m^2-1,那么这个多项式等于______.
26.-(2x^2-y^2)-[2y^2-(x^2+2xy)]=______.
27.若-3a^3b^2与5ax-by+2是同类项,则x=______,y=______.
28.(-y+6+3y^4-y^3)-(2y^2-3y^3+y^4-7)=______.
29.化简代数式4x^2-[7x^2-5x-3(1-2x+x^2)]的结果是______.
30.2a-b^2+c-d^3=2a+( )-d^3=2a-d^3-( )=c-( ).
31.3a-(2a-3b)+3(a-2b)-b=______.
32.化简代数式x-[y-2x-(x+y)]等于______.
33.[5a^2+( )a-7]+[( )a^2-4a+( )]=a^2+2a+1.
34.3x-[y-(2x+y)]=______.
35.化简|1-x+y|-|x-y|(其中x<0,y>0)等于______.
36.已知x≤y,x+y-|x-y|=______.
37.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
38.4a^(2n)-a^n-[3a^n-2a^(2n)]=______.
39.若一个多项式加上-3x^2y+2x^2-3xy-4得
2x^2y+3xy^2-x^2+2xy,
则这个多项式为______.
40.-5x^m-x^m-(-7x^m)+(-3x^m)=______.
41.当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
43.当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b+5c)=______.
44.-2(3x+z)-(-6x)+(-5y+3z)=______.
45.-5a^n-a^(n+1)-(-7a^(n+1))+(-3a^n)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a^2+[7a^2-2a-(-a^2+3a)]=______.
49.7x^2-[9(y^2-3)+4(5x^2+y^2+6)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.

Answer 2

你最好到文库中搜索
如果只是化简，最好搜索初二数学
http://wenku.baidu.com/search?word=%B3%F5%C8%FD%CA%FD%D1%A7&lm=1&od=0

Answer 3

你百度下：A++在线学习实训平台。现在免费注册的，里面有很多题，都有答案的，自己找吧。