150道化简求值题

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1、150道化简求值题1．3ab-4ab+8ab-7ab+ab=______.2.7x-(5x-5y)-y=______.3.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.4.-7x2+6x+13x2-4x-5x2=______.5.2y+(-2y+5)-(3y+2)=______.266.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.7.2a-(3a-2b+2)+(3a-4b-1)=______.8.-6x2-7x2+15x2-2x2=______.9.2x-(x+3y)-(-x-y)-(x-y)=______.

2、10.2x+2y-[3x-2(x-y)]=______.11.5-(1-x)-1-(x-1)=______.2612.()+(4xy+7x2-y2)=10x2-xy.13.(4xy2-2x2y)-()=x3-2x2y+4xy2+y3.14.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.15.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.16.若a=-0.2,b=0.5,代数式-(

3、a2b

4、-

5、ab2

6、)的值为______.17.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个

7、多项式等于______.2618.-(2x2-y2)-[2y2-(x2+2xy)]=______.19.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.20.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.21.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.22.2a-b2+c-d3=2a+()-d3=2a-d3-()=c-().31.3a-(2a-3b)+3(a-2b)-b=______.2623.化简代数式x-[y-2x-(x+y)]等于______.24.[5a2+()a

8、-7]+[()a2-4a+()]=a2+2a+1.25.3x-[y-(2x+y)]=______.26.化简

9、1-x+y

10、-

11、x-y

12、(其中x<0,y>0)等于______.27.已知x≤y,x+y-

13、x-y

14、=______.28.已知x<0,y<0,化简

15、x+y

16、-

17、5-x-y

18、=______.2629.4a2n-an-(3an-2a2n)=______.30.若一个多项式加上-3x2y+2x2-3xy-4得2x2y+3xy2-x2+2xy,则这个多项式为______.31.-5xm-xm-(-7xm)+(-3xm)=______.32.当a=-1,b=-2时,[

19、a-(b-c)]-[-b-(-c-a)]=______.33.当a=-1,b=1,c=-1时,-[b-2(-5a)]-(-3b+5c)=______.2634.-2(3x+z)-(-6x)+(-5y+3z)=______.35.-5an-an+1-(-7an+1)+(-3an)=______.36.3a-(2a-4b-6c)+3(-2c+2b)=______.38.9a2+[7a2-2a-(-a2+3a)]=______.39.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.40.2(2a2+2ab)-(3a2+4ab-b2），其中a=2

20、，b=-12641.1/4（a+b）2-6(a-b)+3/4(a+b)2+6(a-b)42.5（a-b）2-3(a-b)2-7(a-b)-(a-b)2+7(a-b)43.1/2a2-1/4b+3/2a2-3/4b-a244.-5yx2+4xy2-2xy+6x2y+2xy+545.16m+25-40m+34m46.(4+2x)+(2x-x)2647.4a+8a-(-6a)+3a-2b48.8a+4(a+2)49.(2n-3)+(2n+3)-(2n-3)50.7x-(5x-5y)-y51.3a-4b+4a-3b52.7a+3b-(4a+5b)-32653.3ab-4ab

21、+8ab-7ab+ab54.(x-y)-2(x-y)55.16m+25-40m+34m56.(4+2x)+(2x-x)57.4a+8a-(-6a)+3a-2b58.8a+4(a+2)2659.(2n-3)+(2n+3)-(2n-3)60.7x-(5x-5y)-y61.3a-4b+4a-3b62.7a+3b-(4a+5b)-363.3ab-4ab+8ab-7ab+ab64.(x-y)-2(x-y)2664.x-[y-2x-(x+y)]65.3ab-4ab+8ab-7ab+ab66.7x-(5x-5y)-y67.23a^3bc^2-15ab^2c+8abc-24a^