整式计算题与答案
2个回答
展开全部
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)=______.
6.(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)=______.
10.2x+2y-[3x-2(x-y)]=______.
11.5-(1-x)-1-(x-1)=______.
12.( )+(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-(|a2b|-|ab2|)的值为______.
17.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
18.-(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)=______. 还有一些题 一、1、a+(2b-3c-4d)=_________;
2、a-(-2b-3c+4d)=________;
3、(m-n)-3(z-p)=________;
4、3x-[5x-(2x-1)]=________;
5、4x2-[6x-(5x-8)-x2]=___________;
二、化简(28分)
1、(1)(3x+5y)+(5x-7y)-2(2x-4y);
(2)5ab-{1、a+(2b-3c-4d)=
2、a-(-2b-3c+4d)=
3、(m-n)-3(z-p)=
4、3x-[5x-(2x-1)]=
5、4x2-[6x-(5x-8)-x2]=
6、(3x+5y)+(5x-7y)-2(2x-4y);
7、5ab+[2a2b+(a2b-3ab)]-2a2b}
三、化简后求值(16分)
(2x2-x-1)-(x2-x- )+3(x2-1 ),其中x=1 .
四、1、7x-3y-4z=-(_________);
2、a2-2ab-a-b=a2-2ab-(_________);
3、5x3-4x2+2x-3=5x3-(_________)-3;
4、a3-a2b+ab2=-(_______)+ab2=a3-(________);
5、5a2-6a+9b=5a2-3(_____)=-6a-(______);
6、x3-3x2y+3xy2-y3=x3-3x2y-(_____)=x3-y3-(______);
五、(1)(x3-4x2y+5xy2-3y3)-(-2xy2-4x3+x2y);
(2)一个多项式减去3a4-a3+2a-1得5a4+3a2-7a+2,求这个多项式.
2.7x-(5x-5y)-y=______.
3.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.
4.-7x2+6x+13x2-4x-5x2=______.
5.2y+(-2y+5)-(3y+2)=______.
6.(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)=______.
10.2x+2y-[3x-2(x-y)]=______.
11.5-(1-x)-1-(x-1)=______.
12.( )+(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-(|a2b|-|ab2|)的值为______.
17.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
18.-(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)=______. 还有一些题 一、1、a+(2b-3c-4d)=_________;
2、a-(-2b-3c+4d)=________;
3、(m-n)-3(z-p)=________;
4、3x-[5x-(2x-1)]=________;
5、4x2-[6x-(5x-8)-x2]=___________;
二、化简(28分)
1、(1)(3x+5y)+(5x-7y)-2(2x-4y);
(2)5ab-{1、a+(2b-3c-4d)=
2、a-(-2b-3c+4d)=
3、(m-n)-3(z-p)=
4、3x-[5x-(2x-1)]=
5、4x2-[6x-(5x-8)-x2]=
6、(3x+5y)+(5x-7y)-2(2x-4y);
7、5ab+[2a2b+(a2b-3ab)]-2a2b}
三、化简后求值(16分)
(2x2-x-1)-(x2-x- )+3(x2-1 ),其中x=1 .
四、1、7x-3y-4z=-(_________);
2、a2-2ab-a-b=a2-2ab-(_________);
3、5x3-4x2+2x-3=5x3-(_________)-3;
4、a3-a2b+ab2=-(_______)+ab2=a3-(________);
5、5a2-6a+9b=5a2-3(_____)=-6a-(______);
6、x3-3x2y+3xy2-y3=x3-3x2y-(_____)=x3-y3-(______);
五、(1)(x3-4x2y+5xy2-3y3)-(-2xy2-4x3+x2y);
(2)一个多项式减去3a4-a3+2a-1得5a4+3a2-7a+2,求这个多项式.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询