150道化简求值题
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)=______.
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)=______.
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=______.
23.化简代数式x-[y-2x-(x+y)]等于______.
24.[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1.
25.3x-[y-(2x+y)]=______.
26.化简|1-x+y|-|x-y|(其中x<0,y>0)等于______.
27.已知x≤y,x+y-|x-y|=______.
28.已知x<0,y<0,化简|x+y|-|5-x-y|=______.
29.4a2n-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, [a-(b-c)]-[-b-(-c-a)]=______.
33.当a=-1,b=1,c=-1时, -[b-2(-5a)]-(-3b+5c)=______.
34.-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，b=-1
41 .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-a2
44. -5yx2+4xy2-2xy+6x2y+2xy+5
45.16m+25-40m+34m
46.(4+2x)+(2x-x)
47.4a+8a-(-6a)+3a-2b
48.8a+4(a+2)
49.(2n-3)+(2n+3)-(2n-3)
50.7x-(5x-5y)-y
51.3a-4b+4a-3b
52.7a+3b-(4a+5b)-3
53.3ab-4ab+8ab-7ab+ab
54.(x-y)-2(x-y)
55.16m+25-40m+34m
56.(4+2x)+(2x-x)
57.4a+8a-(-6a)+3a-2b
58.8a+4(a+2)
59.(2n-3)+(2n+3)-(2n-3)
60.7x-(5x-5y)-y
61.3a-4b+4a-3b
62.7a+3b-(4a+5b)-3
63.3ab-4ab+8ab-7ab+ab
64.(x-y)-2(x-y)
64.x-[y-2x-(x+y)]
65.3ab-4ab+8ab-7ab+ab
66.7x-(5x-5y)-y
67.23a^3bc^2-15ab^2c+8abc-24a^3bc^2-8abc
68.-7x2+6x+13x2-4x-5x2
69.2y+(-2y+5)-(3y+2)
70.(2x2-3xy+4y2)+(x2+2xy-3y2)
71.2a-(3a-2b+2)+(3a-4b-1)
72.-6x2-7x2+15x2-2x2
73.2x-(x+3y)-(-x-y)-(x-y)
74.2x+2y-[3x-2(x-y)]
75.5-(1-x)-1-(x-1)
76.10x2-xy．
78.x3-2x2y+4xy2+y3．
79.4x2-[7x2-5x-3(1-2x+x2)]
80.2(2a2+2ab)-(3a2+4ab-b2），其中a=2，b=-1
81.1/4（a+b）2-6(a-b)+3/4(a+b)2+6(a-b)
82.5（a-b）2-3(a-b)2-7(a-b)-(a-b)2+7(a-b)
83.1/2a2-1/4b+3/2a2-3/4b-a2
84.-5yx2+4xy2-2xy+6x2y+2xy+5
85.16m+25-40m+34m
86.(4+2x)+(2x-x)
87.4a+8a-(-6a)+3a-2b
88.8a+4(a+2)
89.(2n-3)+(2n+3)-(2n-3)
90.7x-(5x-5y)-y
91.3a-4b+4a-3b
92.7a+3b-(4a+5b)-3
93.3ab-4ab+8ab-7ab+ab
94.(x-y)-2(x-y)
95.16m+25-40m+34m
96.(4+2x)+(2x-x)
97.4a+8a-(-6a)+3a-2b
98.8a+4(a+2)
99.(2n-3)+(2n+3)-(2n-3) 100.7x-(5x-5y)-y
101.3a-4b+4a-3b
102.7a+3b-(4a+5b)-3 103.3ab-4ab+8ab-7ab+ab 104.(x-y)-2(x-y)
105.x-[y-2x-(x+y)]
106.3ab-4ab+8ab-7ab+ab
107.7x-(5x-5y)-y
108.23a3bc2-15ab2c+8abc-24a3bc2-8abc 109.-7x2+6x+13x2-4x-5x2
110.2y+(-2y+5)-(3y+2)
111.(2x2-3xy+4y2)+(x2+2xy-3y2)
112.2a-(3a-2b+2)+(3a-4b-1)
113.-6x2-7x2+15x2-2x2 114.2x-(x+3y)-(-x-y)-(x-y) 115.2x+2y-[3x-2(x-y)] 116.5-(1-x)-1-(x-1) 117.10x2-xy．
118.x3-2x2y+4xy2+y3．