您的当前位置:首页正文

八年级数学上学期易错计算题专练(精心整理)含答案,推荐文档

2020-08-14 来源:步旅网


一.计算 1、 66  (6)6

八年级数学易错计算题专练

2、( p2 )3

3、(4 104 )  (3102 )

4 、 a5  a2  (a2 )

1 1 5、( x2 y3 ) ( x2 y)

3 2

6、(6x  4)(3x  2)

7、(4x3 y  6x2 y2  xy3 ) 

1

2xy (7xy2 )2  ( x2 y  y2 )

7

2 1

8、 40  39 (简便计算)

3 3

9、

10、 (m  n)(m  n) 11、 (2m  3n)2 12、(a  b)(a  b)

13、 (a  b  c)(a  b  c)

14、(a  b  c)2

15、 (x  2)(x  2)(x2  4)

16、(x  2 y)2

17、 (3a  4b  2c)2

18、已知 a   5 ,求 a4 

1 1

的值

a a4

19、已知 a  b  4 , a2  b2  11 ,求(a  b)2

20、已知 xa  3, xb  2 ,求 x2ab

二、分解因式:

2 2

(1) a (x  1)  b (1 x)

(2) (m2  n 2 )2  4m2n 2

4

(3) x  16

2 2

(4) 6xy  x  9 y

(5) x  y 10x  y 25

2

(6)  16  9x 2

(7) m  n 4n 2

2

(8)a2  b2  4b  4

(9).

x 2  4xy  1  4 y 2

10.下列各式从左到右的变形是因式分解的是(

).

A. x 2  2x  3  (x  1)2  2 B. (x  y)(x  y)  x 2  y 2 D. 2x  2 y  2(x  y)

C. x-xy+y=(x-y)

222三、计算

解方程(一定要检验)(1)

2

  12 x  3 3  x x2  9

1

(2)

1 x 1  3x  2 2  x

a2

(3)计算  a  1

a  1

答案

At the end, Xiao Bian gives you a passage. Minand once said, \"people who learn to learn are very happy people.\". In every wonderful life, learning is an eternal theme. As a professional clerical and teaching position, I understand the importance of

continuous learning, \"life is diligent, nothing can be gained\can achieve better self. Only by constantly learning and mastering the latest relevant knowledge, can employees from all walks of life keep up with the pace of enterprise development and innovate to meet the needs of the market. This document is also edited by my studio professionals, there may be errors in the document, if there are errors, please correct, thank you!

因篇幅问题不能全部显示,请点此查看更多更全内容