目录七上数学化简求值50道及答案 化简求值题带答案 七年级化简求值题50道带答案 七年级整式化简求值题及答案 初一化简求值100道答案
呵呵运汪埋!答案就旁蚂在这
1 a+[a+b+c]-[b-a]=3a+c
2 a×{b+c}-a[b-c]=2ac
3 {[a÷b]×{b÷a+1]}×{b÷a}=1
4 a+b-{c×2a}-ac+3[ab+ac}=a+b+3ab
5 {a+b+c}²+1=a²+b²+c²陵猛+2ab+2ac+2bc+1
6 {a+b}{a-b}+2a{3b-2b]=a²+b²-2ab
3.3ab-4ab+8ab-7ab+ab=______.
4.7x-(5x-5y)-y=______.
5.23a3bc2-15ab2c+8abc-24a3bc2-8abc=______.
6.-7x2+6x+13x2-4x-5x2=______.
7.2y+(-2y+5)-(3y+2)=______.
11.(2x2-3xy+4y2)+(x2+2xy-3y2)=______.
12.2a-(3a-2b+2)+(3a-4b-1)=______.
13.-6x2-7x2+15x2-2x2=______.
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.(4xy2-2x2y)-( )=x3-2x2y+4xy2+y3.
21.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A+B=______.
22.已知A=x3-2x2+x-4,B=2x3-5x+3,计算A-B=______.
23.若a=-0.2,b=0.5,代数好歼式-(|a2b|-|ab2|)的值为______.
25.一个多项式友铅冲减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
26.-(2x2-y2)-[2y2-(x2+2xy)]=______.
27.若-3a3b2与5ax-1by+2是同类项,则x=______,y=______.
28.(-y+6+3y4-y3)-(2y2-3y3+y4-7)=______.
29.化简代数式4x2-[7x2-5x-3(1-2x+x2)]的结果是______.
30.2a-b2+c-d3=2a+( )-d3=2a-d3-( )=c-( ).
31.3a-(2a-3b)+3(a-2b)-b=______.
32.化简代数式x-[y-2x-(x+y)]等于______.
33.[5a2+( )a-7]+[( )a2-4a+( )]=a2+2a+1.
34.3x-[y-(2x+y)]=______.
35.激答化简|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|=______.
38.4a2n-an-(3an-2a2n)=______.
39.若一个多项式加上-3x2y+2x2-3xy-4得
2x2y+3xy2-x2+2xy,
则这个多项式为______.
40.-5xm-xm-(-7xm)+(-3xm)=______.
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.-5an-an+1-(-7an+1)+(-3an)=______.
46.3a-(2a-4b-6c)+3(-2c+2b)=______.
48.9a2+[7a2-2a-(-a2+3a)]=______.
50.当2y-x=5时,5(x-2y)2-3(-x+2y)-100=______.
2(2a�0�5+2ab)-(3a�0�5+4ab-b�0�5)含斗,其中a=2,b=-1
1/4(a+b)�0�5-6(a-b)+3/4(a+b)�0�5+6(a-b)
5(a-b)�0�5-3(a-b)�0�5-7(a-b)-(a-b)�0�5+7(a-b)
1/2a�判缓0�5-1/4b+3/2a�0�5-3/4b-a�0�5
-5yx�0�5+4xy�0�掘老模5-2xy+6x�0�5y+2xy+5
16m+25-40m+34m
(4+2x)+(2x-x)
4a+8a-(-6a)+3a-2b
8a+4(a+2)
(2n-3)+(2n+3)-(2n-3)
7x-(5x-5y)-y
3a-4b+4a-3b
7a+3b-(4a+5b)-3
3ab-4ab+8ab-7ab+ab
(x-y)-2(x-y)
.16m+25-40m+34m
.(4+2x)+(2x-x)
4a+8a-(-6a)+3a-2b
.8a+4(a+2)
(2n-3)+(2n+3)-(2n-3)
7x-(5x-5y)-y
3a-4b+4a-3b
.7a+3b-(4a+5b)-3
3ab-4ab+8ab-7ab+ab
.(x-y)-2(x-y)
x-[y-2x-(x+y)]
3ab-4ab+8ab-7ab+ab
7x-(5x-5y)-y
23a3bc2-15ab2c+8abc-24a3bc2-8abc
-7x2+6x+13x2-4x-5x2
2y+(-2y+5)-(3y+2)
(2x2-3xy+4y2)+(x2+2xy-3y2)
2a-(3a-2b+2)+(3a-4b-1)
-6x2-7x2+15x2-2x2
2x-(x+3y)-(-x-y)-(x-y)
2x+2y-[3x-2(x-y)]
5-(1-x)-1-(x-1)
10x2-xy.
x3-2x2y+4xy2+y3.
4x2-[7x2-5x-3(1-2x+x2)]
1 a+[a+b+c]-[b-a]=3a+c
2 a×{b+c}-a[b-c]=2ac
3 {[a÷b]×{b÷a+1]}×{b÷a}=1
4 a+b-{c×2a}-ac+3[ab+ac}=a+b+3ab
5 {a+b+c}²+1=a²皮空+b²+c²+2ab+2ac+2bc+1
6 {a+b}{a-b}+2a{3b-2b]=a²+b²-2ab
汗打了脊纤那么长时间终于打出樱握仿来了,给个分数吧
、-9(x-2)-y(x-5)
(1)化简整个式子。
(2)滑模旁当x=5时,求y的解。
2、5(9+a)×b-5(5+b)×a
(1)化简信橡整个式子。
(2)码行当a=5/7时,求式子的值。
3、62g+62(g+b)-b
(1)化简整个式子。
(2)当g=5/7时,求b的解。
4、3(x+y)-5(4+x)+2y
(1)化简整个式子。
5、(x+y)(x-y)
(1)化简整个式子。
6、2ab+a×a-b
(1)化简整个式子。
7、5.6x+4(x+y)-y
(1)化简整个式子。
8、6.4(x+2.9)-y+2(x-y)
(1)化简整个式子。
9、(2.5+x)(5.2+y)
(1)化简整个式子。