The first volume of the final examination paper of junior one mathematics and its answers.

People's education edition, the first volume of the first grade, the final examination paper of mathematics and the answers.

I sorted out the final papers and answers about seventh grade mathematics published by People's Education Press, and provided students with timely self-test, missing items and filling in the blanks. At the same time, I hope it will be helpful for students' math preparation, and if it is right, I hope it will be helpful ~

People's Education Edition Volume I Mathematics Final Examination Paper.

1. Fill in the blanks: (2 points for each small question, * * * 20 points)

The reciprocal of 1 1. It's two.

2. According to the weather forecast of 265438+February 0, 2007 by the Central Meteorological Observatory, on the 22nd (winter solstice), the lowest temperature in Beijing was -4℃, and the lowest temperature in Nanping was 6℃. On this day, the lowest temperature in Beijing is lower than that in Nanping.

3. Use rounding method to approximate the following numbers: (1)0.00356≈ (keep two significant figures).

(2) 1.8935 material (accurate to 0.00 1)

4. The population of Jian 'ou City is about 510.5 million, which is expressed by scientific notation.

If the purchase price of a dress is in 50 yuan and the profit rate is 20%, the selling price should be set at RMB.

6. If the solution of equation 2x3m 1 about x is x 1, then m

7. The morning reading time of a school is 7: 30-7: 50. During this time, the minute hand rotates in degrees.

8. If 5xny2 and 12x3y2m are similar terms, then mn9. If a three-digit number is A, the decimal number is B and the hundredth digit is C, then the three-digit number can be expressed as

10. Write the unary linear equation that satisfies "① the coefficient of unknown quantity is 1, ② the solution of equation is 3" as 2.

Second, multiple-choice questions (2 points for each small question, *** 12 points)

1 1. In the following groups, the inverse number is ().

A. 1 and (1)2 B. (1)2 and 1 C.2 and 1 D.2 and 2 2.

C

E 12. If a is a rational number, the relationship between 4a and 3a is () a.4a >; 3ab.4a = 3ac.4a & lt3ad. Not sure.

13. As shown in the figure, OC is the bisector of straight angle ∠AOB, OD and OE are the bisectors of ∠AOC and ∠BOC, respectively, E.

There are () corners in the figure that are complementary to ∠COD.

1

14. If aman, then the following equation may not be true ().

A.am3an 3 B . 5am 5 an c . Mn d . O B 1 1 aman 22

15. The following judgment is correct ()

A. The complementary angle of acute angle is not necessarily obtuse; B. the complementary angle of an angle must be greater than this angle.

C. If two angles are complementary angles of the same angle, they are equal; D. complementary acute and obtuse angles

16. A cultural mall sells two electronic pianos at the same time, each of which is sold in 960 yuan. In terms of cost, if one of them makes a profit of 20% and the other loses 20%, the mall will sell it this time ().

A. Don't lose money, don't earn B. Earn 160 yuan C. Earn 80 yuan D. Lose 80 yuan.

Iii. Answering questions (***68 points)

17. Draw a picture according to the following statement (5 points)

(1) as the line segment AB=3cm.

(2) Take the midpoint c of the intersecting line AB as the ray CD.

(3) Make the bisector CE of ∠ACD

(4) Measure the degree of ∠BCD and find the size of ∠DCE.

18. Calculation (4 points for each question, * * * 8 points)

( 1)(2)2(4)

22 19. Simplified evaluation: (6 points) 5a[3a2(2a3)4a], in which a31(2)103 [(4) 2 (132) 2] 4/kloc-

20.(6 points) The table on the right lists the time differences between several foreign cities and Beijing (numbers with a plus sign indicate that the same time is several hours later than Beijing time): For example, the opening ceremony of the 5th Asian Games held in Doha, Qatar, started at 17: 00 Beijing time, while Tokyo time was 18: 00 at this time. If it's 9: 00 Beijing time, what time is it in new york? ② If Xiaodong is in Beijing now and wants to call her menstruation in Paris, do you think it is appropriate and why?

People's education edition, the first volume of the first grade, the final examination paper of mathematics and the answers.

People's education edition, the first volume of the first grade, the final examination paper of mathematics and the answers.

③ At 9: 00 am (new york time) on September 1 2006, the sister building of World Trade Center was attacked by two planes hijacked by terrorists. When is Beijing at this time?

2 1.(6 points) As shown in the figure, the right-angle vertices c of two right-angle triangular rulers are stacked together.

① If ∠ DCB = 35, find the degree of ACB.

② If ∠ ACB = 140, find the degree of DCE.

3 guess the relationship between ∠ACB and ∠DCE, and write your guess, but don't explain the reasons.

Ed

A

B.C.

22.(6 points) At point O, the ship measured that Island A was 60 due east by north, with a distance of 4 kilometers, so Island B was 30 due west by north, with a distance of 3 kilometers. Draw the positions of A and B with 1cm for 1km, measure the length of line AB on the map, and calculate the actual distance between island A and island B. ..

Dongxidao

south

23.(7 points) The teacher wrote an equation 2x 1x2 1 on the blackboard, and Xiaoming immediately raised his hand and asked for 34.

On the blackboard, he did this: 4(2x 1) 13(x2) ①.

8x4 13x6 ②

8x3x 164 ③

1 1x 1 ④

1x ⑤ 1 1

The teacher said: Xiao Ming has mastered the general steps of understanding the linear equation of one variable, but he made a mistake in solving the problem. Please point out that he made a mistake in the first step (fill in the number 0; Then, you carefully solve the following equation:

Page 3/5

2x 1x 12 Believe you, you can do it right! 43

24.(7 points) It takes 48 hours for the school to sort out a batch of books. Now it is planned that some people will work for four hours first, and then three people will work with them for six hours to finish the work. Assuming that these people are equally efficient, how many people should be arranged first?

25.(8 points) A middle school has several sets of desks and chairs in stock, which will be restored to support poor mountain schools. At present, there are two carpentry groups. A repairs 16 sets of tables and chairs every day, and B repairs 8 sets of tables and chairs every day. It will take more than 20 days for A to repair these desks and chairs, and the school pays 80 yuan's repair fee to Group A every day. (1) How many sets of desks and chairs are in stock in this middle school? (2) During the restoration process, the school should send workers to supervise the quality, and the school should pay their living expenses 10 yuan/day. There are three repair schemes: A, Party A will repair it alone; B. Party B shall maintain it alone; C. Party A and Party B shall cooperate in maintenance at the same time. Which scheme do you think saves time and money? Why?

26.(9 points)

(1) A user 1(2) If the user's water meter is faulty, only 60% of the water is recorded each time, so the water fee is paid in February. 43.2 yuan

How much water fee did users actually pay in February?

Refer to the answer to the final examination paper of mathematics in the first volume of the first day of the People's Education Press.

1. Fill in the blank: 1. -2; 2. 10; 3.( 1)0.036; (2) 1.894; 4.5. 15 10; 5.60; 6.- 1; 7. 120; 8. 1;

3; 9. 100 c+ 10 b+a； 10.5 13x； 22

Second, multiple-choice questions: 1 1. a； 12.d； 13.c； 14.c； 15.c； 16.D

Iii. Answer questions: 17. That's right (1)(2)(3) every minute 1. (4) Measure and find the answer, and each score is 1.

18.( 1)24; (2)-968

19. Original formula = 9aa6-2;

20.( 1) 20: 00 new york time yesterday; (2) inappropriate. It's 2 am Paris time, and menstruation is resting;

(3) At this time, Beijing time is 22: 00.

2 1.( 1)∠ACB =∠ACE+∠ECB = 90-35+90(2)∠DCE =∠ACD-∠ACE = 90。

22. Draw OA and OB correctly and get 2 points each; The measured length of AB is 5cm, and the actual distance between Island A and Island B is 5km.

23. The error is in step (1). x2 17 2

24. solution: suppose that x people are arranged to work for 4 hours first, and then according to the meaning of the question:

4x 6(x3) 1； The solution is x = 3；; A: Arrange three people to work first. 4848

Xx2025。 Solution: If the middle school has X sets of desks and chairs in stock, then; The solution is x=960. Scheme c saves time and money. 16 168

26. Omit.

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