简单一点
不要填空题,选择题,只要计算题。最好有答案和过程。必须是 化简求值!!!!!!!!
50道化简求值计算题 苏教版七年级上
答案:2 悬赏:20 手机版
解决时间 2021-03-04 16:20
- 提问者网友:做自己de王妃
- 2021-03-04 10:56
最佳答案
- 五星知识达人网友:迷人又混蛋
- 2021-03-04 11:48
化简求值
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,代数式-(|a2b|-|ab2|)的值为______.
25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
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.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=______.
有理数混合运算
:(1)-5-9+3; (2)10-17+8;
(3)-3-4+19-11; (4)-8+12-16-23.
2.计算:
(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;
3.计算:
(1)(-36)-(-25)-(+36)+(+72); (2)(-8)-(-3)+(+5)-(+9);
(3) ; (4)-9+(-3 )+3 ;
4.计算:
(1)12-(-18)+(-7)-15;
(2)-40-28-(-19)+(-24)-(-32);
(3)4.7-(-8.9)-7.5+(-6);
答案:
1、(1)-11;(2)1;(3)1;(4)-35
2、(1)3.1;(2)-0.7;(3) ;(4)
3、(1)25;(2)-9;(3) ;(4)-9
4、(1)8;(2)-41;(3)0.1
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
(1)-1+2-3+4-5+6-7;
(2)-50-28+(-24)-(-22);
(3)-19.8-(-20.3)-(+20.2)-10.8;
(4)0.25- +(-1 )-(+3 ).
8-4÷(-2); 12、-9+5×(-6)-12÷(-6)
14、-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕;
20、0÷(-4)-42-(-8)÷(-1)3;
21、-32-(-3) 2-(-3)3+(-1)6;
24、3×(-2)2+(-2×3)2+(-2+3)2;
34、(-12)÷4×(-6)÷2;
36、(-12)÷4×(-6)÷2;
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,代数式-(|a2b|-|ab2|)的值为______.
25.一个多项式减去3m4-m3-2m+5得-2m4-3m3-2m2-1,那么这个多项式等于______.
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.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=______.
有理数混合运算
:(1)-5-9+3; (2)10-17+8;
(3)-3-4+19-11; (4)-8+12-16-23.
2.计算:
(1)-4.2+5.7-8.4+10; (2)6.1-3.7-4.9+1.8;
3.计算:
(1)(-36)-(-25)-(+36)+(+72); (2)(-8)-(-3)+(+5)-(+9);
(3) ; (4)-9+(-3 )+3 ;
4.计算:
(1)12-(-18)+(-7)-15;
(2)-40-28-(-19)+(-24)-(-32);
(3)4.7-(-8.9)-7.5+(-6);
答案:
1、(1)-11;(2)1;(3)1;(4)-35
2、(1)3.1;(2)-0.7;(3) ;(4)
3、(1)25;(2)-9;(3) ;(4)-9
4、(1)8;(2)-41;(3)0.1
[-|98|+76+(-87)]*23[56+(-75)-(7)]-(8+4+3)
5+21*8/2-6-59
68/21-8-11*8+61
-2/9-7/9-56
4.6-(-3/4+1.6-4-3/4)
1/2+3+5/6-7/12
[2/3-4-1/4*(-0.4)]/1/3+2
22+(-4)+(-2)+4*3
-2*8-8*1/2+8/1/8
(2/3+1/2)/(-1/12)*(-12)
(-28)/(-6+4)+(-1)
2/(-2)+0/7-(-8)*(-2)
(1/4-5/6+1/3+2/3)/1/2
18-6/(-3)*(-2)
(5+3/8*8/30/(-2)-3
(-84)/2*(-3)/(-6)
1/2*(-4/15)/2/3
-3x+2y-5x-7y
(1)-1+2-3+4-5+6-7;
(2)-50-28+(-24)-(-22);
(3)-19.8-(-20.3)-(+20.2)-10.8;
(4)0.25- +(-1 )-(+3 ).
8-4÷(-2); 12、-9+5×(-6)-12÷(-6)
14、-1-〔1-(1-0.6÷3)〕×〔2-(-3)×(-4)〕;
20、0÷(-4)-42-(-8)÷(-1)3;
21、-32-(-3) 2-(-3)3+(-1)6;
24、3×(-2)2+(-2×3)2+(-2+3)2;
34、(-12)÷4×(-6)÷2;
36、(-12)÷4×(-6)÷2;
全部回答
- 1楼网友:一叶十三刺
- 2021-03-04 12:21
化简求值: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)=______.
( ) (4xy 7x2-y2)=10x2-xy.
(4xy2-2x2y)-( )=x3-2x2y 4xy2 y3.
已知a=x3-2x2 x-4,b=2x3-5x 3,计算a b=______.
已知a=x3-2x2 x-4,b=2x3-5x 3,计算a-b=______.
若a=-0.2,b=0.5,代数式-(|a2b|-|ab2|)的值为______.
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______.
-(2x2-y2)-[2y2-(x2 2xy)]=______.
若-3a3b2与5ax-1by 2是同类项,则x=______,y=______.
(-y 6 3y4-y3)-(2y2-3y3 y4-7)=______.
化简代数式4x2-[7x2-5x-3(1-2x x2)]的结果是______.
2a-b2 c-d3=2a ( )-d3=2a-d3-( )=c-( ).
3a-(2a-3b) 3(a-2b)-b=______.
化简代数式x-[y-2x-(x y)]等于______.
[5a2 ( )a-7] [( )a2-4a ( )]=a2 2a 1.
3x-[y-(2x y)]=______.
化简|1-x y|-|x-y|(其中x<0,y>0)等于______.
.已知x≤y,x y-|x-y|=______.
已知x<0,y<0,化简|x y|-|5-x-y|=______.
4a2n-an-(3an-2a2n)=______.
若一个多项式加上-3x2y 2x2-3xy-4得
2x2y 3xy2-x2 2xy,
则这个多项式为______.
-5xm-xm-(-7xm) (-3xm)=______.
当a=-1,b=-2时,
[a-(b-c)]-[-b-(-c-a)]=______.
当a=-1,b=1,c=-1时,
-[b-2(-5a)]-(-3b 5c)=______.
-2(3x z)-(-6x) (-5y 3z)=______.
.-5an-an 1-(-7an 1) (-3an)=______.
3a-(2a-4b-6c) 3(-2c 2b)=______.
9a2 [7a2-2a-(-a2 3a)]=______.
当2y-x=5时,5(x-2y)2-3(-x 2y)-100=______.
2x―[6-2(x-2)] 其中 x=-2
(5a+2a2-3-4a3)-(-a+3a3-a2),其中a=-2
我要举报
如以上问答信息为低俗、色情、不良、暴力、侵权、涉及违法等信息,可以点下面链接进行举报!
大家都在看
推荐资讯