Los Angeles, Washington, Washington, Los Angeles

2.7)-5℃，0℃8)- 1，-29)2 10)-2 1 1)5，-5，5 12) A-B

3, 60+40+82+82+16+38 = 31814) Solution: a-2=0, A+B-5 = 0 ∴ A = 2; B = 315) (1)11,(2)-(20 15/20 16), (3) Even number is positive n/(n+1)16) (1) 8-9+4+7-2-10+18-3+7+5 = 25, at point a.

17) solution: according to the problem, b = a+4 ∴ b-2a = a+4-2a = 5 ∴ a =-1 ∴ the origin is on the right side of point a1unit distance.

18)( 1) 1/9、- 1/ 10、 1/ 1 1、- 1/ 150(2) 1/9、- 1/ 10、- 1/ 1 1、- 1/ 150

(3) 1、- 1/2、- 1/3、 1/2( 150/4=37......2)

Solution: The original formula = (1/2-1/4)+(1/4-1/6)+...+(1/2012-/) kloc-0//20 14= 1006/20 14=503/ 1007

Homework 2

IB，A，A，C，C。

2, 6)380000, 290000, 5.70, 199. 17)0

8) 2 or 4

9) 3,4,5 1 0 (1) 0 or 4,1or 3 (2) 3,2,0, 1 3,11(65438)

12) solution: ∫b

( 1)B(2)A(3) 12

Homework 3

International Chamber of Commerce, China, China, Britain, China, D.

2.7)- 1/3，28) 5，59) 3 10) 5-a，a-32 1 1)8(x-y)-5(x+y)65438+

14)xy2-x2y，-6 15)-8 16) 12 17)x2-πx2/4 =( 1-π/4)x 23.45438+。

(2)A(3)64，8， 15 ,( n- 1)2+ 1，n2，2n- 1，2n3-3n2+3n- 1

Homework 4

Id card, ID card, ID card, ID card, ID card

2，6)-37)-68) x+7+x-7 = 54， 1 1， 18，259) 2000 10) 66 3， 165438+。

15) There are 55 people in No.1 Middle School and 45 people in No.2 Middle School, which is 725 yuan cheaper; 16)x/5 =(x-50-70)/3； 5Y-3Y = 50+70 17)2 18)6

Homework five

I. D，B，C，A，B II，6)(A-B)/27)2× 12x = 18(26-X)8)43809) 1 1，265438+。

X/(12-8)+X/(12+8) =14.4/60x = 0.8 (㎞)12) Solution: Let a classmate * * * do the X problem correctly.

5X-(20-X)=76X= 16 (topic)

Solution:15a+2a (35-15) = 275a = 5 (yuan /m3) Solution: The shepherd in Jiagu has x sheep.

X-1= (x+1)/2+1+0x = 7 (7+1)/2+1= 515 solution: ①/kloc- 0× 0.8 = 65438 (1-0.05)-1= 0.217) Solution:1) 75,5252) (1060+375).

0.2X-375 = 0.25(X- 1000)-975 X = 17000 17000×0.2-375 = 3025

Exercise of real questions in senior high school entrance examination

D2)40

3)① Solution: Let the expressway between the two places be x kilometers long,

X/(4.5-0.5)- 10 = X/4.5x = 360km②295.4 =(360-48-36)A+ 100+80+5A = 0.4。

Homework 6

International Chamber of Commerce, China, D, B, C.

2) Triangle and sector 7) 5,38) 4cm9) 6, -2 10) N- 13,1)12) f, c, a/kloc-0.

17) Quadruprism According to the three views, the diagonal of the diamond is 3cm, the side length of the 4cm ∴ diamond is 5/2cm ∴S side =5/2×8×4=80 (square centimeter).

18) solution: If the width of a rectangular box is x cm, the length is X+4cm and the height is14/2-x cm x+4+2 (14/2-x) =13x = 5.

If the width of a rectangular box is 5 cm, the length is 9 cm and the height is 2 cm. V=9×5×2=90 (cubic centimeter).

19) climb to the top along the vertical edge first, and then climb to the fly along the diagonal. The diagonal distance is the shortest.