七年级数学上册《整式的加减》计算题1（无答案） 新人教版

《整式的加减》计算题1. ab-4ab+8ab-7ab+ab
3．7x-(5x-5y)-y
5．23a3bc2-15ab2c+8abc-24a3bc2-8abc．
7．-7x2+6x+13x2-4x-5x2
9．2y+(-2y+5)-(3y+2)
11．(2x2-3xy+4y2)+(x2+2xy-3y2)
13．2a-(3a-2b+2)+(3a-4b-1)
15．-6x2-7x2+15x2-2x2
2．2x-(x+3y)-(-x-y)-(x-y)
4．2x+2y-[3x-2(x-y)]
6．5-(1-x)-1-(x-1)
8．( )+(4xy+7x2-y2)=10x2-xy．
10．(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3．
12．已知A=x3-2x2+x-4，B=2x3-5x+3，计算A+B
14．已知A=x3-2x2+x-4，B=2x3-5x+3，计算A-B．
16．若a=-0.2，b=0.5，求代数式-(|a2b|-|ab2|)的值
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______．
19．-(2x2-y2)-[2y2-(x2+2xy)]
21．若-3a3b2与5ax-by+2是同类项，求xy的值．
23．计算化简:(-y+6+3y4-y3)-(2y2-3y3+y4-7)
25．化简代数式4x2-[7x2-5x-3(1-2x+x2)]
27．2a-2b+c-3d=2a+( )-d=2a-3d-( )=c-( )．
29．化简3a-(2a-3b)+3 (a-2b)-b
18．[5a2+( )a-7]+[( ) a2-4a+( )]=a2+2a+1．
20．化简3x-[y-(2x+y)]．
22．化简|1-x+y|-|x-y|(其中x＜0，y＞0)．
24．已知x≤y，化简x+y-|x-y|
26．已知x＜0，y＜0，化简|x+y|-|5-x-y|
28．化简4a2n-an-(3an-2a2n)
、
30．若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy，
求这个多项式
31．化简-5xm-xm-(-7xm)+(-3xm)．
33．当a=-1，b=-2时，求
[a-(b-c)]-[-b-(-c-a)]的值
35．当a=-1，b=1，c=-1时，求
-[b-2(-5a)]-(-3b+5c)的值
37．化简-2(3x+z)-(-6x)+(-5y+3z)
39．-5an-an+1-(-7an+1)+(-3an)．
41．3a-(2a-4b-6c)+3(-2c+2b)
43．9a2+[7a2-2a-(-a2+3a)]．
45．当2y-x=5时，5(x-2y)2-3(-x+2y)-100．
32．(4x2-8x+5)-(x3+3x2-6x+2)．
34．(0.3x3-x2y+xy2-y3)-(-0.5x3-x2y+0.3xy2)．
36．-{2a2b-[3abc-(4ab2-a2b)]｝．
38．(5a2b+3a2b2-ab2)-(-2ab2+3a2b2+a2b)．
40．(x2-2y2-z2)-(-y2+3x2-z2)+(5x2-y2+2z2)．
42．(3a6-a4+2a5-4a3-1)-(2-a+a3-a5-a4)．
44．(4a-2b-c)-5a-[8b-2c-(a+b)]．
46．(2m-3n)-(3m-2n)+(5n+m)．
47．(3a2-4ab-5b2)-(2b2-5a2+2ab)-(-6ab)．
49．xy-(2xy-3z)+(3xy-4z)．
51．(-3x3+2x2-5x+1)-(5-6x-x2+x3)．
53．3x-(2x-4y-6x)+3(-2z+2y)．
55．(-x2+4+3x4-x3)-(x2+2x-x4-5)．
57．若A=5a2-2ab+3b2，B=-2b2+3ab-a2，计算A+B．
59．已知A=3a2-5a-12，B=2a2+3a-4，求2(A-B)．
61．2m-{-3n+[-4m-(3m-n)]｝．
48．4(x-y+z)-2(x+y-z)-3(-x-y-z)．
50．2(x2-2xy+y2-3)+(-x2+y2)-(x2+2xy+y2)．
52．2(a2-ab-b2)-3(4a-2b)+2(7a2-4ab+b2)．
54.2x2-｛-3x-[4x2-(3x2-x)+(x-x2)]｝．
56：-(7x-y-2z)-｛[4x-(x-y-z)-3x+z]-x｝．
58:(+3a)+(-5a)+(-7a)+(-31a)-(+4a)-(-8a)．
60：a3-(a2-a)+( a2-a+1)-(1-a4+a3)．
．
62．4x-2(x-3)-3[x-3(4-2x)+8]．