1 and (20 1 1) are simplified first and then evaluated \

2, (20 10) calculation.

3.(06 Wuhan) Simplify before evaluating:

4.(07 Wuhan) Simplified evaluation:, where x = 2.

5.(08 Wuhan) Simplify before evaluating.

6.(09 Wuhan) Simplify before evaluating.

7.( 10 Wuhan) Simplify first and then evaluate: (x-2-), where.

8.(20 1 1 Wuhan senior high school entrance examination) Simplify first, then evaluate: (), where x = 3.

9. (Taian, 2009) Simplify first and then evaluate:

10. (Qinghai, 2009) Please simplify the simplified formula before substituting it into the evaluation.

1 1.(2009, Baotou) Simplification

12. (Jiangxi, 2009) Simplify first and then evaluate: Among them,

13.(20 10 Anhui senior high school entrance examination) Simplify first, then evaluate:, in which

14.(20 10 Chongqing) Simplify first, then evaluate:, where.

15.(20 10 Linyi, Shandong) Simplify first and then evaluate:, in which.

16.(20 10 Hengyang, Hunan) Simplify first and then evaluate:, in which.

17.(20 10 Ezhou, Hubei Province) is simplified first, and then a number from-1, 1, 2 is selected as the value of x to substitute for evaluation.

18.(20 10 Laiwu, Shandong) Simplify first and then evaluate:

19.(20 10 Chuxiong, Yunnan) Simplify first and then evaluate:, in which.

20.(20 10 Leshan, Sichuan) Simplify first and then evaluate:

2 1.(20 10 Shanxi) Simplify first and then evaluate:

22.(20 10, Guiyang, Guizhou) Simplify first: when appropriate, select a suitable integer from the range of -2 < < 2 and substitute it for the solution.

23.(20 10 Heilongjiang Suihua) Simplification: First, select a number you like and substitute it for evaluation.

24.(20 10 Xiantao Qianjiang Tianmen) is simplified first and then evaluated, where a=2.

25.(20 10 Zhaoqing, Guangdong) Simplify first and then evaluate: (1+), that is, x =-5.

26.(20 10 Jilin) Simplify first, and then select an appropriate X value to substitute for evaluation.

27.(20 1 1 Shandong Linyi 5,3 points) Simplify (x-)( 1-)

28.(20 1 1 Shandong Taian) Simplification: (-) Small

29.(20 1 1 Nanchong, Sichuan) Simplify first and then evaluate: (-2), where x=2.

30.(20 1 1 Chongqing, Sichuan) Simplify first and then evaluate: (-) Where x

3 1, (20 1 1 Changde, Hunan) is simplified first and then evaluated.

32.(20 1 1 Taizhou, Jiangsu)

33.(20 1 1 Jining, Shandong) Calculation:

34.(20 1 1 Chongqing Jiangjin) Simplify first, then evaluate:, in which ...

35.(20 1 1 Nanjing, Jiangsu) Calculation

36.(20 1 1 Zhaoqing, Guangdong) Simplify first, then evaluate:, in which.

37.(20 1 1 Zaozhuang, Shandong) Simplify first and then evaluate:, where x =-5.

38, -9(x-2)-y(x-5) Simplified formula, when x=5, find the solution of y.

39,5 (9+a) × b-5 (5+b) × a (1) simplifies the whole formula. (2) When a=5/7, find the value of the formula.

40. Simplify the assessment. [(5x+2y) (3x+2y)+(x+2y)]/4x, where x=2, y=3 4 1, A=x3-2x2+x-4, B=2x3-5x+3, and find a+.

42. Given A=x3-2x2+x-4 and B=2x3-5x+3, find the value of a-b. 43. If a=-0.2 and b=0.5, the value of algebraic expression (|a2b|-|ab2|). 44. When a=- 1, b= 1 and c=- 1, find the value of [b-2(-5a)]-(-3b+5c). 45. When 2y-x=5, find the value of 5(x-2y)2-3(-x+2y)- 100. 46. Given A+B = 5 and AB = 3, find the value of A2+B2.

47. Given x2-4 = 0, find the value of the algebraic expression x (x+ 1) 2-x (x2+x)-x-7.

48. Given ︱ x+y-3 ︱+(x-y- 1) 2 = 0, find the value of algebraic expression [(-x2y) 2] 3.

49. Given x =, y =- 1, find the value of (x+y) 2-(x+y) (x-y).

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