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The seventh grade mathematics (on) unit test questions.

Chapter 1 Rational Numbers

First, multiple-choice questions (4 points × 10 = 40 points)

The absolute value of 1 and 2008 is ()

A, 2008b, 208c, 208d,

2, the following calculation is correct ()

a 、-2+ 1=-3 B 、-5-2=-3 C 、- D、

In recent years, the development of education in Anhui Province has been accelerated. According to the statistical data at the end of 2005, there are about 3.34 million students in ordinary junior high schools, and 3.34 million students are expressed as () by scientific notation.

A, 0.334× person B, 33.4× person C, 3.34× person D and 3.34× person.

4, the opposite of each other in the following logarithm is ()

A, -(-8) and +(+8) b, -(+8) and +|-8 |

C, -d, -|-8 | and +(-8)

5. The result of calculating (-1) ÷ (-5) × is ().

a 、- 1 B、 1 C、D 、-25

6, the following statement, the correct is ()

A has the smallest rational number B and the smallest negative number.

C has a number d with the smallest absolute value and a positive number with the smallest absolute value.

7. Xiaoming does morning exercises on a north-south road. The operation records are as follows: (Beizheng, unit: m): 500, -400,-700,800. Xiao Ming's total running distance is ().

A, 800m b, 200m c, 2400m d, 200m

8. Known | x | = 2, y=9, x y

A, 5 B,-1 C, -5 or-1 D, 1

9. It is known that the distance from point A on the number axis to the origin is 2 unit lengths, so the distance from point A on the number axis to the origin is 3 unit lengths, and the number represented by this point is ().

a， 1 b，2 c，3 d，4

10. There is a piece of paper with a thickness of 0.1mm. After being folded in half for 20 times, its thickness can be expressed as ().

A, (0. 1×20) mm b, (0. 1×40) mm c, (0. 1×2) mm d, (0. 1×20) mm.

Second, fill in the blanks (5 points × 4 = 20)

1 1. Mom gave it to Xiaoying 10 yuan, and Xiaoying wrote "+10 yuan". What does "-5 yuan" possibly mean?

12, a positive integer, plus-10, and its sum is less than 0, then this positive integer may be. (just write two).

13. When a classmate uses a calculator to calculate "2÷ 13", the result displayed on the calculator is 0. 153846 153. Keep this result to three significant figures.

14, observe the following figures and fill in the appropriate figures on the horizontal line according to the law.

2,5, 10, 17, , .

Three. (8 points× 2 =16 points)

15, five rational numbers are given below.

- 1.5 6 0 -4

(1) Fill the above figures in the corresponding set circle.

Positive and negative numbers

(2) Please calculate the difference between the sum of integers and the product of fractions.

16, the following table shows the lowest temperature in some cities in China on a certain day:

Beijing Shanghai Guangzhou Harbin Hangzhou Ningbo

-4℃ - 1℃ 6℃ - 10℃ 0℃ 2℃

(1) Please put the numbers in the table on the axis.

(2) Rank the city names from low to high according to the lowest temperature of the weather.

4.(8 points× 2 =16 points)

17, calculation:

( 1)-40-(- 19)+(-24) (2)

18, calculation:

( 1) (2)

Verb (abbreviation of verb) (10 point × 2 = 20 points)

19, the heights of Xiaoying, Xiaoli and Xiaohu are shown in the following table.

Name: Xiaohu Xiaoying Xiaoli

Height ()155150147

(1) Take Xiaoli's height as the standard, marked as 0㎝, and use rational numbers to represent Xiaoying's and Xiaohu's heights.

(2) If Xiaoying's height is -8㎝, what should Xiao Hu and Xiao Li be ㎝?

The temperature dropped by 0.6℃ per kloc-0/00 meter from the foot of a mountain in a certain area, and now the temperature at the foot of the mountain is 4℃.

(1) Find the temperature at the height of 1200m from the foot of the mountain.

(2) If the temperature somewhere on the mountain is -5℃, find the height from here to the foot of the mountain.

Six, (12 points)

2 1. The operating conditions of shopping malls A and B in the first half of the year are as follows ("+"means profit, "-"means loss, in millions).

June one two three four five

A shopping mall+0.8+0.6-0.4-0.1.1+0.2

Mall b+1.3+1.5-0.6-0.1+0.4-0.1

(1) How much did Mall B lose compared with Mall A in March?

(2) In June, how much was the profit of Mall A more than that of Mall B?

(3) How much did A and B stores earn or lose each month on average in the first half of the year?

Seven (12)

22. As shown in the figure, a point starts from the origin on the number axis, first moves 2 unit lengths to the right, and then moves 5 unit lengths to the left. You can see that the end point is -3, and it is known that A and B are points on the number axis. Please think about it with reference to the picture below and complete the following questions.

(1) If the number represented by point A is-1 and point A moves to the right by 4 unit lengths, then the number represented by point B is. The distance between a and b is.

(2) If the number 2 represented by point A moves point A to the left by 6 unit lengths and then to the right by 3 unit lengths, then the number represented by point B is. The distance between a and b is.

(3) If the number M represented by point A moves point A by n unit lengths to the right and then by p unit lengths to the left, please guess that the number represented by endpoint B is. The distance between a and b is.

Eight, (14 points)

23. A truck starts from the supermarket, walks 3 kilometers east to Xiao Bin's house, continues to walk 1.5 kilometers to Xiaoying's house, walks 9.5 kilometers west to Xiaoming's house, and then returns to the supermarket.

(1) With the supermarket as the origin and the east as the positive direction, 1 unit length stands for 1km. Can you point out the positions of Xiaoming's family, Xiaobin's family and Xiaoying's family on the number axis?

How far is Xiaoming's home from Xiao Bin's?

(3) How many kilometers has the truck traveled?

Reference answer:

First, multiple choice questions

Title 1 2 3 4 5

Answer A D D B C

Title 6 7 8 9 10

Answer C C D B C

Second, fill in the blanks

1 1, 5 yuan 12, 1, 2,3, ...13,0.15414,26,37.

Third,

15, positive number: 6, negative number:-1.5, -4

(6+0-4)-(- 1.5×)=3

16, (1) omitted.

(2) Harbin, Beijing, Shanghai, Hangzhou, Ningbo and Guangzhou

17, (1) Original formula =-40+ 19-24=-45.

(2) The original formula = = =

18, (1) Original formula =

(2) Original formula =

=- 1+(-3)× 18-(-2)

=- 1-54+2=-53

19, (1) Xiaoying: -3cm Tiger: +5㎝

(2) Tiger: 0 Xiao Li: -5㎝.

20、( 1)4-0.6× 1200÷ 100=-3.2(℃)

(2) 4-(-5) = 9 9 ÷ 0.6×100 =1500m

2 1, (1)-0.6-(-0.4)=-0.2 (millions)

-0.2× 1000000=-200000, with a loss of 200000 yuan.

(2)+0.2-(-0. 1)=0.3 (millions)

0.3× 1000000=300000 yuan, and the extra profit is 300000 yuan.

(3) A: (+0.8+0.6-0.4-0.1+0.1.2) ÷ 6 = 0.2 (ten thousand) = 200,000 yuan.

B: (+1.3+1.5-0.6-0.1+0.4-0.1) ÷ 6 = 0.4 (ten thousand) = 400,000 yuan.

The average monthly income of mall A is 200,000, and that of mall B is 400,000.

22 、( 1)3，4 (2)- 1，3 (3)m+n-p，|n+p |

23. (1) omitted. (2)8 km (3) 19 km

2009-20 10 seventh grade mathematics first semester final examination paper.

(Full score: 150 minutes: 120 minutes)

Name: Score:

First, multiple-choice questions (this question 10 small questions, 3 points for each small question, out of 30 points)

1, one number is 8, and the other number is -2 less than the opposite number of 8, and the sum of these two numbers is ............................... ().

a 、-2 B、 14 C 、+2 D、 18

2, four formulas: ①, ②, ③, ④, incorrect.

The exact number is .................................................... ().

a， 1 b，2 c，3 d，4

3. If A stands for rational number, then the correct one in the following sentence is ………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………….

A, +a and -(-a) are opposites. B, +a and -a must not be equal.

C and -a must be negative numbers, and d, -(+a) and +(-a) must be equal.

4. If it costs RMB to buy an air conditioner, it will cost 10 yuan ............................... ().

A. 10 yuan B. 10 yuan C.D.

The opposite number of 5 is ............................................. ()

A.B. C. D。

6. At that time, it was equal to ....................................... ()

a6 b . 4 c . 2d . 3

7. When the contemporary number expression is equal to the algebraic expression k +3, the value of k is .......................................................... ().

A.7b 8c 9d 10

8. The score of the football match is: win a game with 3 points, draw a game with 1 point, lose a game with 0 points, and the first team played a game with 14.

After losing five games, * * * scored 19, and then the team won ................................................ ().

A.3 B.4 C.5 D.6

9. As shown in the figure below, different rays and line segments can be represented by letters as .............................................................................. ().

A.3 line segments, 3 rays B. 6 line segments, 6 rays

C.6 line segments, 4 rays D. 3 line segments, 1 ray.

(Question 9)

10, given that points A, B and C are all points on a straight line L, and AB=5cm, BC=3cm, the distance from point A to point C is ... ().

A.8cm b.2cm c.8cm or 2cm d.4cm

Fill in the blanks (this topic is ***5 small questions, with 4 points for each small question, out of 20 points)

1 1, the approximate value of 63200 is accurate; There is a valid number.

12, given that |a|=2, | b | = 3, and a > b, then a+b = _ _ _ _.

13. If and are similar items, then = _ _ _ _ _, = _ _ _ _ _.

14, the solution of the equations is, then A+B = _ _ _ _.

15, and the ratio of an angle to its complementary angle is 4: 5, then the degree of the complementary angle of this angle is.

Three. (There are ***4 small questions in this question, with 5 points for each small question, out of 20 points)

16、 17、

18、 19、90 - 18 26′59〃

Four, (this question ***5 small questions, each small question 8 points, out of 40 points)

20. if a and b are reciprocal, c and d are reciprocal, and the absolute value of m is 2, find the value of (A+B+CD) m-CD.

2 1, as shown in the figure, is a geometric figure composed of five small squares.

Please draw a picture from the front, top and left.

22. Xiaohong's father bought 65,438+0,000 shares of a company last Friday, each 27 yuan. The following table shows the daily ups and downs of the stock this week.

Monday, Tuesday, Wednesday, Thursday and Friday.

Up and down +4 +4.5-1 -2.5 -6 per share.

(1) From the above table, what do you think is the stock price at the close on Wednesday?

(2) What is the highest per share this week? How much is the minimum?

(3) Show the daily ups and downs of the stock this week with a broken-line statistical chart.

23. Simplify first, then evaluate.

24. As shown in the figure, AB=24cm, points C and D are on the AB line, and CD= 10cm. M and n are the midpoint of AC and BD, respectively. Find the length of the straight line MN.

V. (This question 10)

25. The distance between A and B is 36 kilometers. A goes from A to B, and B goes from B to A, both of which start at the same time. Four hours later, they met. After six hours, the remaining distance of A is twice that of B. Find the speed of both.

Six, (this question 10)

26, known ∠ AOB = 80, ∠ BOC = 20, find ∠AOC degree.

Seven, (this question 10)

27, junior high school students' vision problems have been widely concerned by the whole society. The relevant departments of a city conducted a sampling survey on the eyesight of 200,000 junior high school students in the city, and randomly sampled the eyesight of all junior high school students in 10 middle school. The following figure is the statistical chart of annual sampling. Please answer the following questions according to the picture below:

(1) What is the total number of junior high school students in this 10 middle school?

(2) Among the junior high school students in this 10 middle school, what is the proportion of the total number of junior high school students in the city whose eyesight is above 4.75?

(3) There are 66,000 students taking the senior high school entrance examination in this city. Please estimate the number of students taking the senior high school entrance examination in this 10 middle school in this city.

Eight, (this question 10)

28. After the implementation of natural forest protection and beautiful mountain river construction in Enshi, a farmer planted 32 apple trees on the mountain. In the first year of harvest, farmers randomly picked apples from five trees and weighed the apples on each tree as follows: (unit: kg)

35.2 33.5 34.2 34.3 32.8

(1) What is the estimated total output of apples this year according to the sample?

(2) If the price of apples this year is 3 yuan per kilogram, please estimate the farmer's total income from selling apples.

(3) Assuming that the sales price of apples remains unchanged for three consecutive years, farmers plan to increase the income of apples to 4080 yuan in the second year. At this growth rate, what is the estimated total income of apples in the third year?

2009-20 10 seventh grade mathematics first semester final examination paper answer.

1-5:ADDCC 6- 10:CBCCC

1 1, 100 yuan, 3

12,-1 or -5

13、3,2

14、3

15、 10

16、-2

17、x=-2

18、

19、7 1 33′ 1〃

20, -3 or 1

2 1、

22, (1)34.5 yuan (2)35.5 yuan, 26 yuan (3) omitted.

23, the original type, when, when, the value is;

24、MN = MC+CD+ND = AC+CD+DB =(AC+DB)+CD =(AB—CD)+CD = 17。

25. let the speed of a be X km/h and the speed of b be y km/h.

4(x+y)=36

2(36-6x)=36-6y

X=4 and y=5 are obtained by solving.

Answer: The speed of A is 4 km/h and the speed of B is 5 km/h. 。

26.∞∠AOC = 100 or ≤ AOC = 60

27.( 1)20×5%= 1 (ten thousand people) (2) 1×55%÷20=2.75%.

(3)66000÷(20× 10000)=33%, and the students taking the senior high school entrance examination are: 1× 10000×33%=3300 (person).

28、

(2)3× 1088=3264 (yuan);

(3) Let the annual growth rate be x, then 3264 (1+x) = 4080,

X=25%, and the total income in the third year is:

4080× (1+25%) = 5100 (yuan) Yongning junior high school 2010-1seventh grade mathematics (I) midterm paper.

Class name score

Students, after half a semester's study, do you feel the charm of mathematics? This paper will record your confidence, composure, wisdom and gains. I believe you can do it!

First, multiple-choice questions (each question has only one correct answer 3 points × 12 = 36 points)

1, the following numbers: -(-2), -|-2|, (-2)2, -22, (-2)3, -23 The number of negative numbers is ().

a，2 B，3 C，4 D，5。

2. China's land area is 9.60× 106km2, which is rounded off, so ().

A, there are three significant figures, accurate to one hundredth of b, and there are three significant figures, accurate to ten thousand.

C, there are three significant figures, accurate to one million d, there are two significant figures, accurate to one hundred thousand.

3, the following statement, is not correct ()

A, the number whose square equals itself is only 0 and1; B, two negative numbers, the negative number with large absolute value is small;

C. The absolute value of a positive number is itself, and the absolute value of a negative number is its inverse; D, 0 is divided by any number to get 0;

4, the following formula conforms to the algebraic writing format is ()

A. 40 BC

The reciprocal of 5 is ()

A.B. C. D。

6. If A is a quintic polynomial and B is also a quintic polynomial, then the degree of A+B is ().

A. Ten times B. Five times C. No more than five times D. Not sure

7. A piece of white paper with a thickness of 0. 1mm has a thickness of () after being folded in half five times in a row.

A, 0.5mm b, 0.8mm c,1.6mm d, 3.2mm.

8. If the value of the algebraic expression is 8, the value of the algebraic expression is ().

a . 2 B- 7 c- 17d . 7

9. On the number axis, the number represented by a point with a distance of 2 from the point representing the number-1 is ().

A, 1 B, 3 C, 2 d, 1 or -3

10, Xiao Min wrote four numbers according to a certain rule: 1, and according to this rule, the fifth number should be ().

A.B. C. D。

1 1. If X represents a two-digit number and Y also represents a two-digit number, Xiao Ming wants to form a four-digit number with X and Y, and put X on the right side of Y. Which of the following expressions do you think is correct ()?

a、yx B、x + y C、 100x + y D、 100y + x

12, if < 0, > 0, +< 0, then the following relationship is correct ().

A, B,

C, D,

Two. Fill in the blanks (3 points × 10 = 30 points)

The reciprocal of 13 is _ _ _ _ _ _, the reciprocal is _ _ _ _ _, and the absolute value is _ _ _ _ _.

14 is a _ _ _ _ _ item with a coefficient of _ _ _ _.

15. if a and b are reciprocal, m is the number with the smallest absolute value.

Then =

16, the profit of this commodity is RMB, the profit rate is 20%, and the purchase price of this commodity is RMB _ _ _ _ _.

17, it is known that the polynomial is quartic, and it is _ _ _ _ _ _ _.

18, called +=0, then.

19, if a-b = 2 and a+c = 4, then (2a+b+c)-2(a-b-c)=.

20. If someone goes up the mountain at a speed of 4km/h and down the mountain at a speed of 5km/h, the average speed of the whole journey is km/h. ..

2 1, give X an appropriate rational number to minimize the value of |x+5|+|x+7|. The minimum value is

22 is equal to.

Third, answer questions.

23. Careful calculation (5 points× 6 = 30 points)

( 1) (-28)÷(―6+4)+(― 1)×5 (2) - 14-[2―(―3)2]+(- 1)4

(3)(2) (4) -|-32|÷3×(-)-(-2)3

(5) solving the equation; (6) Solving equations

24.(6 points) Given the position of A and B on the number axis, please connect A, B, -A and -B with ">".

25.(8 points) Evaluation: Among them,

26.(8 points) A classmate did a math problem: "Try to find two polynomials, =", and this classmate took "as". The answer is, what is the correct answer?

27.(8 points) In order to save water, a city water supply company adopts the following charging methods: the monthly water consumption of each household does not exceed 10 ton, and the charge per ton is 1.5 yuan; The monthly water consumption of each household exceeds 10 ton, and the excess is charged according to each ton of 3 yuan. Now we know that Xiaoming's family used tons of water in February (> 10). How much does Xiaoming have to pay for water in February? If = 16, how much does Xiao Ming have to pay for water in February?

28.( 10) During the "October 1st" Golden Week, the number of tourists in Fuyang Ecological Park during the seven-day holiday changed as follows (a positive number means more people than the previous day, and a negative number means less people than the previous day).

Date 10, 1,10,2,10,3,10,4,10,5,/kloc-0,6,/.

Digital change

Unit: 1000 people+1.6+0.8+0.4-0.4-0.8+0.2-1.2.

(1) If the number of tourists on September 30th is a, please use the algebraic expression of a to represent the number of tourists on June 2nd. 10?

(2) Please judge which of the seven days has the most tourists. Please explain the reason.

(3) If the number of tourists is 5,000 on September 30th, the ticket price is per person 10 yuan. How much is the ticket income of Fuyang Ecological Park in Golden Week?

4. Exploration and conjecture: (6 points)

Singleton list:,,,,, ...

Then the 99th and 2065438th+00th monomials are _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

2 Guess that the first and first monomials are _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Verb (abbreviation of verb) hands-on operation: (8 points)

It is known that there are several axes on the paper (as shown in the figure) to fold the paper.

(1) If the point indicated by 1 coincides with the point indicated by-1, the point indicated by -3 coincides with the point indicated by numbers;

(2) If the point indicated by-1 coincides with the point indicated by 5, answer the following questions:

① The point indicated by 3 coincides with the point indicated by numbers;

② If the distance between two points A and B on the number axis is 9(A is on the left side of B), and the two points A and B are folded and overlapped, what are the numbers represented by the two points A and B?

The seventh grade mathematics (on) unit test questions.

Chapter 1 Rational Numbers

First, multiple-choice questions (4 points × 10 = 40 points)

The absolute value of 1 and 2008 is ()

A, 2008b, 208c, 208d,

2, the following calculation is correct ()

a 、-2+ 1=-3 B 、-5-2=-3 C 、- D、

A, 0.334× person B, 33.4× person C, 3.34× person D and 3.34× person.

4, the opposite of each other in the following logarithm is ()

A, -(-8) and +(+8) b, -(+8) and +|-8 |

C, -d, -|-8 | and +(-8)

5. The result of calculating (-1) ÷ (-5) × is ().

a 、- 1 B、 1 C、D 、-25

6, the following statement, the correct is ()

A has the smallest rational number B and the smallest negative number.

C has a number d with the smallest absolute value and a positive number with the smallest absolute value.

7. Xiaoming does morning exercises on a north-south road. The operation records are as follows: (Beizheng, unit: m): 500, -400,-700,800. Xiao Ming's total running distance is ().

A, 800m b, 200m c, 2400m d, 200m

8. Known | x | = 2, y=9, x y

A, 5 B,-1 C, -5 or-1 D, 1

a， 1 b，2 c，3 d，4

10. There is a piece of paper with a thickness of 0.1mm. After being folded in half for 20 times, its thickness can be expressed as ().

A, (0. 1×20) mm b, (0. 1×40) mm c, (0. 1×2) mm d, (0. 1×20) mm.

Second, fill in the blanks (5 points × 4 = 20)

1 1. Mom gave it to Xiaoying 10 yuan, and Xiaoying wrote "+10 yuan". What does "-5 yuan" possibly mean?

12, a positive integer, plus-10, and its sum is less than 0, then this positive integer may be. (just write two).

13. When a classmate uses a calculator to calculate "2÷ 13", the result displayed on the calculator is 0. 153846 153. Keep this result to three significant figures.

14, observe the following figures and fill in the appropriate figures on the horizontal line according to the law.

2,5, 10, 17, , .

Three. (8 points× 2 =16 points)

15, five rational numbers are given below.

- 1.5 6 0 -4

(1) Fill the above figures in the corresponding set circle.

Positive and negative numbers

(2) Please calculate the difference between the sum of integers and the product of fractions.

16, the following table shows the lowest temperature in some cities in China on a certain day:

Beijing Shanghai Guangzhou Harbin Hangzhou Ningbo

-4℃ - 1℃ 6℃ - 10℃ 0℃ 2℃

(1) Please put the numbers in the table on the axis.

(2) Rank the city names from low to high according to the lowest temperature of the weather.

4.(8 points× 2 =16 points)

17, calculation:

( 1)-40-(- 19)+(-24) (2)

18, calculation:

( 1) (2)

Verb (abbreviation of verb) (10 point × 2 = 20 points)

19, the heights of Xiaoying, Xiaoli and Xiaohu are shown in the following table.

Name: Xiaohu Xiaoying Xiaoli

Height ()155150147

(1) Take Xiaoli's height as the standard, marked as 0㎝, and use rational numbers to represent Xiaoying's and Xiaohu's heights.

(2) If Xiaoying's height is -8㎝, what should Xiao Hu and Xiao Li be ㎝?

The temperature dropped by 0.6℃ per kloc-0/00 meter from the foot of a mountain in a certain area, and now the temperature at the foot of the mountain is 4℃.

(1) Find the temperature at the height of 1200m from the foot of the mountain.

(2) If the temperature somewhere on the mountain is -5℃, find the height from here to the foot of the mountain.

Six, (12 points)

2 1. The operating conditions of shopping malls A and B in the first half of the year are as follows ("+"means profit, "-"means loss, in millions).

June one two three four five

A shopping mall+0.8+0.6-0.4-0.1.1+0.2

Mall b+1.3+1.5-0.6-0.1+0.4-0.1

(1) How much did Mall B lose compared with Mall A in March?

(2) In June, how much was the profit of Mall A more than that of Mall B?

(3) How much did A and B stores earn or lose each month on average in the first half of the year?

Seven (12)

(1) If the number represented by point A is-1 and point A moves to the right by 4 unit lengths, then the number represented by point B is. The distance between a and b is.

Eight, (14 points)

How far is Xiaoming's home from Xiao Bin's?

(3) How many kilometers has the truck traveled?

Reference answer:

First, multiple choice questions

Title 1 2 3 4 5

Answer A D D B C

Title 6 7 8 9 10

Answer C C D B C

Second, fill in the blanks

1 1, 5 yuan 12, 1, 2,3, ...13,0.15414,26,37.

Third,