The final exam questions of the first volume of seventh grade mathematics 1. Multiple choice questions (this big question * * 10 small question, 3 points for each question, * * 30 points).
The absolute values of 1 and -6 are ()
A.-6 B、6 C、6 D。
2. On a certain day, the highest temperature in a certain place is 80C and the lowest temperature is -20C, so the temperature difference of that day is ().
a . 100 C B .-60C C . 600 C D .- 100 C
3. As shown in the figure, the surface of a cube is unfolded, so the original cube is similar to? Is it cool? The word marked on the reverse side of the face where the word is located is ().
A. Cool B. All C. Six D. Good
4. The following operation is correct ()
Answer. 3x+3y = 6xyb.-y2-y2 = 0c3 (x+8) = 3x+8d. (6x+2y) =-6x-2y.
5. Among the following surveys, () is suitable for general survey.
Answer: Understand the service life of a batch of ballpoint pen cores. B. Understand the water-saving consciousness of middle school students all over the country.
C find out whether the students in your class have the habit of drinking milk for breakfast. D. understand the eyesight of seventh-grade students in the province.
6. As shown in the figure, the geometry is ().
7. In the following statement, the correct one is ()
A. two points determine a straight line. B. the angle of the vertex on the circle is called the central angle.
C. a figure composed of two rays is called an angle. A triangle is not a polygon.
8. In order to know the height of 4000 junior high school students in our city, 400 students were selected for height measurement. In this question, the sample is ().
A.4000 B .4000 C. 400 Student height D. 400 Student
9. The positions of a, b and c on the number axis are known as the figure, so |a|=|b| is simplified as |a+b|-|a-b|+|b+(-C)|+|a+C|
Used for ()
Answer. -2a-b+C .2a+b-C D.3a-2c
10. Observe the following monomial and explore its laws:,,, According to the above laws, the 2065 438+06 monomial is: ()
A, B, C, D,
II. Fill in the blanks (this big question * * 10 small question, 3 points for each question, 30 points for * *).
The reciprocal of 1 1. -2 is, the reciprocal is, the absolute value.
12. Calculation: -(-2)3 =.
13 degrees. Is, and the coefficient is.
14. According to the main statistics released by Guizhou Provincial Bureau of Statistics, the GDP of our province exceeded the trillion mark last year, and the GDP in 20 15 years was
1050250000000 yuan, this data is expressed in calligraphy yuan of Science Bureau.
15. As shown in the figure, m is the midpoint of AB, n is the midpoint of BC, AB=8cm, BC=6cm, then the line segment MN=.
16. 1800// equals the sum of points.
17. If the value of is 7, the value of is.
18. If it is similar, the value of is; If, then =
19. This equation is after removing the denominator.
20. equal to.
Third, answer questions.
2 1. Calculation:
22. Simplify:
23. Solve the equation:
24. Calculate and evaluate:, and find the value when, when.
25. See the bar chart of Xiaoming's survey results about what ball games Class Two, Grade Seven likes in our school.
(1) How many students are there in Class Two, Grade Seven?
(2) Please show the favorite ball games of Class Two, Grade Seven students in our school with a fan-shaped statistical chart.
(3) What information can be obtained from the statistical chart?
26. All the girls in physical education class passed the exam 100m, and the qualified score was 18s. The following are the scores of five girls in the first group, among which? +? Indicates that the score is greater than 18s. -? Indicates that the score is less than 18s.
-0.4 ,+0.8 , 0 ,-0.8 , -0. 1
(1) Find the compliance rate of this group;
(2) Find the average score of this group of girls?
27. Xiao Bin and Xiao Qiang insist on running every morning. Xiao Bin runs 4 meters per second, and Xiao Qiang runs 6 meters per second. (1) If they stand at both ends of the100m runway and start at the same time, how many seconds will they meet?
(2) If Xiao Qiang stands at the starting point of the 100m runway, and Xiao Bin stands in front of him 10m, and both of them start in the same direction at the same time, can Xiao Qiang catch up with Xiao Bin in a few seconds?
28. A rectangular table can seat six people. Put these tables together as shown in the figure below.
(1) Two tables together can seat () people. Three tables together can seat () people. N tables can sit () people together.
(2) A restaurant has 40 such rectangular tables. If every five tables are combined into a 1 big table as shown in the above figure, then 40 tables can be combined into 8 big tables, and * * * can seat () people.
29. as shown in figure? AOC and? Dobs are all right angles.
(1) as shown in figure? So DOC=280? What is the degree of AOB?
(2) Find the isometric in the figure. What if? Do what? Will they still be equal?
(3) What if? DOC is getting smaller and smaller, and then what? How does AOB change? What if? The doctor is getting older, and then what? How does AOB change?
(4) Draw a picture with the right-angle tool in drawing. Equal angle.
The answer to the final examination questions in the first volume of seventh grade mathematics 1. Multiple choice questions (this big question * * 10 small question, 3 points for each question, 30 points for * * *)
1 .B 2。 A 3。 D 4。 D 5。 C 6。 D 7。 An eight. C 9。 C 10。 D
II. Fill in the blanks (this big question * * 10 small question, 3 points for each question, 30 points for * *).
1 1.、2 、2 ; 12 .8 13 .3,14.15.7
16 .30, 0.517.1918.18 (or 36) 19.
20 .
Third, answer questions.
2 1.
22.
23. Solve the equation:
24. Simplification and evaluation:
25.( 1) Because 16+8+24=48, there are 48 students in Class 2, Grade 7 in this school.
(2) Because, 16? 48? 0.33 ,8? 48? 0. 17 ,24? 48? 0.5, so 0.33? 3600 ? 1 190
0. 17? 3600? 6 10 ,0.5? 3600? 1800 Therefore, the central angle of the basketball sector is 1 190.
The central angle of volleyball is 6 10, and that of table tennis is 1800.
(3) The information from the statistical chart: The number of people who like table tennis in Class Two, Grade Seven is as high as 24, accounting for 50%, and the number who like volleyball is as high as 50%.
At least 8 people, accounting for 17%.
26 。 (1)80%(2) 17.9 seconds
27. (1)10 (2). After 5 seconds, Xiao Qiang can catch up with Xiao Bin.
28 。 (1)8 people, 10 people, 2n+4.
(2) 8 (2n+4), when n = 5, we get 1 12 people.
29 。 ( 1) ? AOB= 1520
(2) Equiangular:? AOC=？ DOB？ AOD=？ A rectangular loaf of bread
What if? Doctor. 280, they will be equal.
(3)? DOC is getting smaller and smaller, and then what? AOB is getting bigger and bigger;
? The doctor is getting older, and then what? AOB is getting smaller and smaller.
(4) as shown in figure? The pig is the angle of painting.