Fill in the blanks in the mid-term exam of senior one mathematics (3 points for each small question, 36 points for * * *).
1, x=5 equation =2x-7 solution. (Fill in "Yes" or "No")
2. After solving the equation and removing the denominator, the equation is transformed into.
D
C
B
A
3. A factory is expected to increase production by 15% this year compared with last year, with an annual output of 600,000 tons. Assuming that the output of this factory was x million tons last year, this equation can be established.
4. As shown by Rt△ABC, ∠ACB=90? ,
CD⊥AB in D, if ∠B=32? So ∠ACD=?
5. If |x-3|=2, then x= or
6. If x= 1 is the solution of the equation, then K=.
7. Transform the equation 3x+7y=9 into an algebraic expression with y to represent x=.
8. The positive integer solution of equation 2x+3y= 12 is as follows.
9. Each inner angle of a regular dodecagon is equal to 10 degree.
10, solve the equation by addition and subtraction, eliminate the unknown y, and get a linear equation.
be
1 1. In △ABC, AC= 13cm and AB=8cm, then the length of BC should be greater than and less than cm.
12. In order to green our hometown, 45 outstanding members of our school went to the suburbs to plant trees. Six girls planted all kinds of trees, and eight boys planted all kinds of trees. After the labor, 320 trees were planted. Suppose there are x male students and y female students in the excellent league members. According to the meaning of the question, the equation can be listed as follows.
Second, multiple-choice questions (3 points for each small question, ***24 points)
1, if the ratio of three internal angles of a triangle is 2:3:5, then the triangle is ().
A, acute triangle B, right triangle C, obtuse triangle D, unable to judge.
2. A set of line segments that cannot form a triangle is ()
a、 15cm、 10cm、7cm B、4cm、5cm、 10cm
C, 8cm, 8cm, 2cm d, 2cm, 3cm, 4cm
3. Solving the equation deformation is correct ()
A, from 2(x-3)-3(x+ 1)=2, 2x-3-3x+3=2.
B, from -6x=-5, x=-
c，from，4(x+2)+3(2x- 1)=4。
D, from 1-, get 1-
4. Only one polygon is used to pave the ground, but what cannot be covered with the ground is ().
A, triangle b, quadrilateral c, regular pentagon d, regular hexagon
5. If the ratio of the sum of inner angles to the sum of outer angles of a polygon is 7:2, then the number of sides of the polygon is ().
a、7 B、8 C、9 D、 10
B
A
C
D
E
6, is the solution of the equation, then the value of a+b is ()
a、 1 B、2 C、3 D、4
7. As the five-pointed star shows, the sum of ∠A+∠B+∠C+∠D+∠E is ()
A, 180 B, 360 C, 540 D, uncertain.
8. In order to cultivate citizens' habit of saving water, a waterworks in a certain city stipulated that the water consumption should not exceed 10 ton, and 0.8 yuan should be charged for each ton, and 1.5 yuan should be charged for the part exceeding 10 ton. The average water fee of Xiaohua's family in March was per ton 1 yuan, so Xiaohua's family used tons of water in March.
a、 12 B、 14 C、 16 D、20
Third, solve the equation (group) (1 5, 2 questions, 10, 3 questions, ***20 points)
1、4(x+ 1)= 1-2(x-3) 2、
3. (Two solutions are needed)
4. Answer questions (8 points for each small question, 24 points for * * *)
1. As we all know, sum satisfies the equation y = kx+b.
(1) Find the values of k and b.
(2) What is the value of x? y=3。
2. As shown in the figure, in △ABC, AD is divided by ∠BAC, ∠ B = 42, ∠ C = 54 to find the degree of ∠ADC.
A
B
C
D
3. As shown in figure ∠ A = 120, ∠ B = 100, ∠ C = 140, try to judge whether AE and CD are parallel, and explain the reasons.
A
E
D
C
B
Verb (abbreviation of verb) practical exploration questions (8 points for each small question, *** 16 points)
1. Xiaoming's father saved 3,000 yuan for Xiaoming's education three years ago, and the sum of principal and interest due this year is 3,243 yuan. Please help Xiao Ming calculate the interest rate of this deposit.
2. The admission price of the zoo is shown in the following table. Two classes of Grade One (1) and (2) in a certain school visited the zoo, among which (1) were less than 50 people and (2) were more than 50 people. If both classes purchase tickets separately by class, then one * * will pay 1207 yuan; If two classes join hands to buy tickets, they only need to pay 909 yuan.
Number of tickets purchased
1-50 people
5 1- 100 people
More than 100 people
Ticket price per person
13 yuan
1 1 yuan
9 yuan
(1) How to judge whether the total number of students in two classes exceeds 100? Tell me your understanding.
(2) Find the number of students in two classes by listing equations or equations.
(3) If the two classes don't buy tickets jointly, do students in Grade One (1) have to buy tickets for 13 yuan? Is there any way you can save money to buy tickets for them? Tell me your reasons.
(4) Do you think it is possible that the amount of money for buying tickets between 5 1- 100 people is equal to the amount of money for more than 100 people? If so, please write down this possibility.
What is the question type of the first semester math exam 20 1 1-20 12? * * There are 25 questions, all of which are geometry questions.
One, 30 points for multiple-choice questions, two. Fill in the blanks and remember the calculation questions. I know the last question is particularly difficult.
This teacher should be able to talk,
Mathematics midterm examination questions in the first semester of grade one.
Time: 120 minutes Total score: 120 minutes
Category: Name:
1. Multiple choice questions: (3 points for each question, * * 36 points. There is only one correct option for each question.
The title is123455678911112.
answer
1. In the section of a cuboid, the polygon with the largest number of sides is ().
A. quadrilateral pentagon hexagon heptagon
2. The following plane figures cannot be folded to form a cube ()
A.B. C. D。
3. Select the symbol () of the conical section shape in the drawing.
(A) (B) (C) (D)
4. Every face of each regular polyhedron below is the same figure ()
① Regular tetrahedron ② Regular hexahedron ③ Regular octahedron ④ Regular dodecahedron ⑤ Regular icosahedron.
A.①②③ B. ①③④ C. ①③⑤ D. ①④⑤
5. If the reciprocal of a number is less than itself, then the number is ().
A. positive numbers B. negative numbers C. positive numbers and zeros D. negative numbers and zeros
6. If it is a rational number, the following statement must be correct ().
( 1).(2).(3).(4).
A. 1 B. 2 C. 3 D.4
7. The following statement is true ()
A. the minuend must be greater than the difference B. the sum of two numbers must be greater than each addend C. the product must be greater than each factor D. the two numbers are equal and their absolute values must be equal.
8. The three views of an object are the following three figures, so the name of the object shape is ().
Look down from the left view
(a) cylinder (b) prism (c) cone (d) sphere
9. In a certain area, the temperature is -7℃ in the morning, 1 1℃ at noon, and 9℃ at midnight, so the temperature at midnight is ().
(A)-9℃ (B)-6℃ (C)-5℃ (D)-3℃
10, a stands for rational number, then the following judgment is correct ().
A means that the reciprocal of negative number B is C, the reciprocal is D, and the absolute value is.
1 1. Comparing the following rational numbers, the correct one is ().
a 、>-4 B 、-5>-4 C 、< D 、- 1>0
12, the following statement is true ()
(a) Integer must be positive. (b) There is such a rational number, which is neither positive nor negative.
(C)0 is the smallest integer. (d) The largest negative number is-1.
1. Fill in the blanks (65438+ 0 for each blank, ***23)
1. rational number-4,500,0,-2.67,5, where the integer is _ _ _ _ _ _ _ _, the negative integer is _ _ _ _ _ _ _ _ _, and the positive score is _ _ _ _ _ _ _.
2. The reciprocal of-is _ _ _ _ _, the reciprocal is _ _ _ _ _ _, and the absolute value is _ _ _ _ _.
3. A number whose square is 0.8 1 is _ _ _ _ _ and whose cube is _ _ _ _.
4. In, the radix is _ _ _ _ _, the index is _ _ _ _ _, and the coefficient is _ _ _ _ _ _.
5. A cuboid is surrounded by _ _ _ _ _ faces, a cylinder is surrounded by _ _ _ _ faces, and a cone is surrounded by _ _ _ _ _ _ faces.
6. An octagonal prism has _ _ _ _ vertices, _ _ _ edges and _ _ _ _ faces.
7. The geometric figure of the surface energy developed into a plan view is shown as follows:
( ) ( ) ( )
8. A truck starts from Carrefour, walks 4 kilometers east to Xiao Bin's house, continues to walk 2.5 kilometers to Xiaoyu's house, walks 12.5 kilometers west to Xiaoming's house, and finally returns to Carrefour. (1) Xiaoming's home is _ _ _ _ _ _ kilometers away from Xiao Bin's home; (2) The truck has traveled _ _ _ _ _ _ _ _ kilometers.
9. The difference between the two readings on the meter counter is the electricity consumption during this period. At 0: 00 on June 1 day, a household electricity meter showed a reading of 12 1 degree, and at 24: 00 on June 7, the electricity meter showed a reading of 163 degree. Judging from the readings displayed by the electricity meter, it is estimated that the total electricity consumption of this family in June is _ _ _ _.
3. Solve the problem (write the solution steps. ***6 1 min)
1. Calculation (***32 points. 4 points for each question. )
( 1).- 12+ 15-|-7-8| (2).(-3)×(-9)-(-5)
(3).(4). 1÷(-3) ×(- )
(5) (6)
(7) 16÷(-2)3-(- )×(-4) (8)-8 1÷2 ×(— )÷(— 16)
2. Draw three views of the geometry as shown in the figure. (9 points)
3.(6 points) This figure is a top view of the geometry composed of several small cubes, and the numbers in the small squares indicate the number of small cubes in this position. Please draw the front and left views of this geometry.
4.(6 points) Someone bought 8 sets of children's clothes with 400 yuan and prepared to sell them at a certain price. Based on the price of each set of children's clothing in 55 yuan, the excess part is recorded as positive, and the insufficient part is recorded as negative, as follows:
+2, -3, +2,+1, -2,-1, 0, -2 (unit: yuan)
(1) Is it a profit or a loss for him to sell these eight sets of children's clothes?
(2) How much did you earn (or lose)?
5. According to the needs of postal service, a postman first walked 3 kilometers from A to the east, and then turned back to the west 10 kilometers. Go back and walk 6 kilometers east. It is right to stipulate the East now. Which direction is the postman in a place at this time? How many kilometers is it from a place? Requirement: Add rational numbers to express this problem on the number axis. (8 points)
answer
First, multiple choice questions
The title is123455678911112.
The answer is c, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b, b. b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b b Babe, babe, babe, babe, babe, babe, babe, babe, babe, babe, babe, babe, babe, babe, babe.
Second, fill in the blanks
1. Integer: -4,500,0 Negative Integer:-4 Positive Score: 5
2. 1/6 6 1/6 3.+0。 9,-0。 9 —4
4.—6 3 —2/3 5.6 3 2 6. 16 24 10
7. Pentagon cylindrical cone 8.10 2519.180
Third, answer questions.
1.( 1)— 12 (2)32 (3)— 1 1 (4) 1/9 (5)— 15/4 (6)9/4
(7)0 (8)— 1
leave out
leave out
4. A: 3 yuan loses money.
5. to the west of a, the distance from A 1 km ... is abbreviated as several axes.
Mid-term examination paper for the first grade math, and mid-term examination paper for the seventh grade last semester.
First, multiple-choice questions (3 points for each small question, 30 points for * * *)
1. The Yangtze River, the longest river in China, is about kilometers long, which is expressed as () by scientific counting method.
A.km.b.km.
Kilometers are kilometers in diameter.
2. The following question is correct ()
A.B.
C.D.
3. The number of negative numbers in is ()
A.B. C. D。
4. The following rights from left to right are ()
A.B.
C.D.
5. A two-digit number, the number on one digit is, the number on the tenth digit is, and the algebraic expression indicates that this two-digit number is ().
A.B. C. D。
The reciprocal of 6 is ()
A.B. C. D。
7. The value of algebraic expression is, then the value of is ().
A.B. C. D。
8. If is, the value of is ()
A.B. C. D。
9. The positions of known numbers,, and on the number axis are shown in the figure, and the result of simplification is ().
A.B. C. D。
10. If,,, then the correct size relationship is ().
A.b； C. D。
Fill in the blanks (3 points for each small question, 30 points for * * *)
1 1. If the water level of the Yellow River is meters higher than the warning water level, it shall be recorded as meters.
So meters means meters above the warning water level.
/kloc-the reciprocal of 0/2. Yes, the countdown is. 13. If, then =
14. Approximate the logarithm by rounding, and keep three significant figures. The result is.
15. and are similar items.
16. Draw a picture with matchsticks as follows. The first picture needs matches.
17. The monomial is a quintic monomial about,,, so n = _ _ _ _ _ _ _ _ _
18. Calculate by calculator: The key sequence is:
, display: _ _ _ _ _ _.
19. If you add a polynomial, then this polynomial is _ _ _ _ _ _ _ _ _ _;
20. Please observe the following formula:
,
,
,
,…
According to the law you found, please write the result of the following formula directly:
___________。
Iii. Answering questions (***60 points)
2 1. Calculation (16 points)
( 1) (2)0
(3) (4)[ ( ) ]÷5
22 (8 points) Simplification and evaluation
(1) Simplify:
(2) simplify first and then evaluate, among which.
23.(8 points) Fill the following figures in the corresponding brackets:
1 1, ,6.5,-8, ,0, 1,- 1,-3. 14
(1) set of positive numbers {…}
(2) Negative Set {…}
(3) Integer set {…}
(4) Positive integer set {…}
(5) Negative integer set {…}
(6) Positive Fraction Set {…}
(7) Negative score set {…}
(8) Rational number set {…}
24.(6 points) Medical research shows that height has certain heritability, so the height of a child can be predicted according to the height of his parents, and the calculation method is as follows:
Son height = (father height+mother height) × 1.08
Daughter height = (father height ×0.923+ mother height)
(1) If the parents are m and n meters tall, please ask others to predict the heights of their sons and daughters when they grow up. (expressed by algebraic expression)
(2) Xiaoming (male) has a father height of1.75m and a mother height of1.62m.. Seek Xiaoming's adult height.
25.(6 points) During the "Eleventh" golden cycle, the number of tourists in Huangshan Scenic Area during the seven-day holiday changes as shown in the following table (a positive number indicates that there are more people than the previous day, and a negative number indicates that there are fewer people than the previous day).
Date 1 2 3 4 5 6 7
Number change (ten thousand people)+1.6+0.8+0.4-0.8+0.2-1.2
(1) Please judge that the day with the largest number of tourists is Japan and the day with the least number is Japan.
They are ten thousand people apart.
(2) If there are at most 30,000 tourists a day, there will be 1 10,000 tourists on September 30th.
26.(8 points) Write the answers in the table according to the following formula:
(1) Fill in the form:
Enter n
three
—2
—3
…
Output the answer1111…
(2) Please express the calculation program in the problem by algebra and simplify it.
27.(8 points) Teacher Li gave the students a question: When,
After the topic was finished, Xiao Cong said, "The conditions given by the teacher are redundant." Xiao Ming said: "If you don't give these two conditions, you won't get the result, which is not superfluous." Which do you think is reasonable? Why?
Reference answer:
I. 1。 a2 . D3 . B4 . C5 . D6 . D7 . b8 . B9 . a 10 . c。
Two. 1 1, low. 12、2.5,—0.4。 13、 。 14、5.66× 106。 15、0。 16、2n+ 1 . 17.3;
18.2、0、—、4、×、(—)、5、=,40。 19.；
20. 1000. Prompt: Through observation, it is found that the rule in setting conditions is that the number on the right side of the equation is the complete square of a natural number, which is equal to the square of a natural number on the left, so1+2+3+…+99+100+99+…+3.
Iii. 2 1. ( 1); (2) ; (3) ; (4) .
22.( 1) 。 (2)3.22。
23.( 1) 1 1,6.5, , 1, (2) ,-8,- 1,-3. 14
(3) 1 1,-8,,0, 1,- 1, (4) 1 1, 1.
(5)-8,- 1 (6)6.5,
(7) ,-3. 14 (8) 1 1, ,6.5,-8, ,0, 1,- 1,-3. 14
24.( 1) The height of the son after adulthood: 0.54 (m+n); Adult height of daughter: (0.623 m+ n).
(2) About1.82m. ..
25.( 1)3、7、2.2 , (2) 0.2 .
26. Solution: The algebraic expression is:, and the simplified result is: 1.
27. The original formula is =, and the combined result is 0, which has nothing to do with the values of A and B, so what Xiao Ming said makes sense.
Reflection on the Mid-term Exam of Junior One Mathematics, beg! In the just-concluded mid-term exam, I made many mistakes that I shouldn't have made.
My Chinese has always been good, but this time, due to some strange coincidences, I made many mistakes in Chinese. After careful reflection, I think this has a lot to do with my carelessness in reading the topic. This also extends to math and English. Many small mistakes in calculation and grammar cost me a lot of points. For example, I can't write this for you. I don't know what happened to you. Just a few small examples, about 50 words.
I know the teacher expected a lot of me, but I still didn't do well in the exam. I'm very sorry about that. But since you made a mistake, you have to correct it. So, I also thought a lot about what I must learn after the exam.
First of all, I want to get rid of the bad habit of not looking at the questions carefully in the exam. Sometimes I often look at the front of the topic and write the following questions conveniently, but there are many mistakes. This may also have something to do with answering skills. In a word, through the later practice, I must carefully examine the questions in the exam, see the questions by myself, and see the questions clearly and optimistically. Check it several times when time permits, and never allow yourself to make unnecessary mistakes like this again.
Secondly, I also want to strengthen the practice of Chinese, mathematics, English, politics, history, geography, biology and physics. After the exam, I finally understand that there are mountains outside the mountains and people outside. On weekdays, everyone gets together to do the same topic, and there is no obvious difference. But as soon as I took the exam, I found that there were so many questions that I had never seen before (just make up first). Only blame yourself for not exercising enough. I can't allow myself to continue like this, so I must redouble my efforts, learn from this exam, increase my strength, prepare for the next exam and lay a good foundation.
Practice is the key to exam skills. In life, I should practice and review more, and make a comprehensive review plan before the exam, so I don't have to be impatient and have no direction. Learn to accumulate good words and sentences in daily life and study, and accumulate difficult topics in mathematics. English is a grammar project. Doing cloze and other exercises is also a good way to improve English.
After all, the mid-term exam is not the final exam, but I still have a chance. In the next exam, I will work harder and try not to disappoint my teachers, parents and classmates. Don't disappoint yourself.
First, you will definitely choose the right multiple-choice questions! (3 points for each small question, ***30 points)
1, the value of calculation: is ()
5th century to 5th century.
2, with the following groups of data as the side length, can form a triangle is ()
A.B. 4，4，C， 10
3, the following calculation is correct ()
A.B.
C.D.
4, the following can be calculated by the square difference formula is ()
A.B.
C.D.
5, in the following groups, the solution of the equation is ()
A, B, C, D,
6, in the following categories, can be used as the final result of factorization is ().
A.a(x2+y2)+2 axy b .(2m-n)[m-(2m-n)]
C.(x2+y2+xy)(x2+y2-xy) D.a2(3-)
7. As shown in the figure, AB‖DF cannot be determined as () under the following circumstances.
A.∠A+∠2= 180 B.∠A=∠3
C.∠ 1 =∠4d∠ 1 =∠A
8.① ② ③ ④ In the following equation
(5), the number of quadratic linear equations is ()
A.0 B. 1 C.2 D.3
9. The patterns shown in the picture are the symbols of Mercedes-Benz, Audi, Volkswagen and Mitsubishi respectively, among which, they can be regarded as the "base".
This pattern is translated into ()
10, whenever the number of sides of a polygon increases, the polygon's ()
A. internal angle and increase of 3600b0. The outer corner has been increased by 3600b0.
C. add a D. inner corner on the diagonal, and add 1800.
Second, fill in the blanks, you can do it quickly and accurately! (2 points for each small question, *** 18 points)
1 1, if am = 2 and an = 3, then am+2n = _ _ _ _ _ _
12, expressed by scientific counting method.
13. If the sum of the internal angles of a polygon is 1440? So the number of sides of this polygon is, and the sum of its outer angles is.
14, if, then Mn =.
15. If h is the intersection of three heights △ABC, AD, BE and CF, then the height of △HBC BC side is, and the height of the BH side is.
16, if x2+mx+4 is completely flat, then m=.
17, calculation: (-) 2006× (-5) 2007 =.
18, if (2a- 1) 0 = 1, then a.
19, if there is no item in the product of; otherwise,.
Third, do math problems and don't make mistakes!
2 1, calculation: (4 points for each small question, *** 16 points)
( 1) (2)
(3) (4)
22, factorization (4 points for each small question, ***8 points)
( 1)x3—x(2)(x2—2x)2+2(x2—2x)+ 1
23, solve the equation (4 points for each small question, ***4 points)
24 (5 points) Simplification and evaluation:
, where a=, b =- 1.
Fourth, draw pictures, draw your style! (5 points for this question)
25. As shown in the figure, first translate the graphics in the grid along the direction of MN, draw new graphics after translation, and then match the translated graphics with appropriate commentary.
5. Solve the problem and do it. It will definitely work!
26. As shown in the figure, BD is △ABC, DE‖BC, the bisector of the angle intersecting with AB at point E, ∠ A = 45,
∠ BDC = 60, find the degree of the bed. (6 ′)
27, explore the application (***8 points)
(1) calculation:
①(a-2)(a2+2a+4)②(2x-y)(4x 2+2xy+y2)
(2) The multiplication result of the algebraic expression above is very concise, and a new multiplication formula can be found:
Please use letters containing a.b.
(3) The following can be calculated by the multiplication formula you found: ()
A.(a-3)(a2-3a+9)b .(2m-n)(2 m2+2mn+N2)
C.(4 x's) (16+4x+x2) D. (m-n) (m2+2mn+N2)
(4) directly use the formula to write the calculation results:
(3x-2y)(9 x2+6xy+4 y2)= 1
(2m-3)(4 m2 ++ 9)= 1
[Reference answer]
First, multiple-choice questions, you will definitely choose the right one!
The title is 1 23455 6789 10.
Answer C A D B C C D B B D
Second, fill in the blanks, you can do it quickly and accurately!
1 1, 18 12, 6.35×10-413, 10 3600 14,/kloc.
17、—5 18、a≠ 19、
Third, do math problems and don't make mistakes!
2 1, calculated as (1)-10 (2)-9a3 (3) 2x2-x-1(4) m2-N2+4n-4.
22. Factor decomposition
( 1)x(x+ 1)(x— 1)(2)(x— 1)4
23, solving equations
24. Simplify before evaluating AB- 1
Fourth, draw pictures, draw your style!
25, omitted
5. Solve the problem and do it. It will definitely work!
26、∠BED= 1500
27 、( 1) ①a3—8 ②8x3-y3
(2) (a-b)(a2+ab+b2)=a3-b3
(3) C
(4) 27x3-8y3 6m 8m3-27
A mid-term exam question 0 in the second volume of junior high school mathematics is two opposite, that is, one is positive and one is negative, or both are zero. According to the meaning of the question, it should all be zero, so that X is 0, Y is 0, and finally it is zero no matter how many times it is squared.