The seventh grade first volume mathematics people teaches printing plate final examination questions.
Multiple-choice question: This big question has 10 small questions, each with 2 points, totaling 20 points.
The reciprocal of 1 Yes ()
A.﹣·c.﹣2
2. The absolute value of-6 is equal to ()
C.﹣ D.﹣6
3. The polynomial 3x2﹣xy2 is ()
A. Quadratic quartile B cubic quartile C quadratic quartile D cubic quartile
4. The following equations are known: Among them, the unary linear equation has ()
①x﹣2=； ②0.2x﹣2= 1； ③ ; ④x2﹣3x﹣4=0； ⑤2x = 0； ⑥x﹣y=6.
A.2 B.3 C.4 D.5
5. The solution of equation 3x+2 (1-x) = 4 is ().
A.x= B.x= C.x=2 D.x= 1
6. If the positions of corresponding points of real numbers A, B and C on the number axis are as shown in the figure, the following inequality holds ().
A.ac & gtbc B.ab & gtCB c . a+c & gt； b+ c d . a+b & gt； c+b
7. If the equation 2x-4 = 3m has the same solution about x as the equation =-5, then the value of m is ().
B.﹣8 C.﹣ 10
8. The following geometric language description is correct ()
A. straight line mn and straight line ab intersect at point d B, and point a is on straight line m.
C. point a is on the straight line AB. Extended straight line AB
9. Price of a dress 132 yuan. If you sell it at a 10% discount, you can still make a profit 10%. Then the purchase price of this dress is ().
A. 106 yuan B. 105 yuan C. 1 18 yuan D. 108 yuan.
10. The picture shows a triangular prism. In the picture below, what can be folded into a triangular prism is ().
A.B. C. D。
Fill-in-the-blank question: This big question has 6 small questions, each with 3 points, totaling 18 points.
11.2013 On April 20, 2003, an earthquake of magnitude 7.0 occurred in Lushan County, Ya 'an City, Sichuan Province. Caring people in our city love the disaster area and actively donate money. As of May 6, the Red Cross Society of our city has received a total donation of about1400,000 yuan, which can be expressed as yuan by scientific notation.
12. Calculation: -(- 1) 2 =.
13. The school bought a batch of books, a total of boxes, each box has B books. If half of these books are donated to the community, then the books donated to the community are these books (represented by algebraic expressions with A and B).
14. It is known that the sum of three numbers in a vertical column in a monthly calendar is 45, so the smallest number among these three numbers is.
15. As shown in the figure, C and D are any two points on the line segment AB, so there are wires in the figure.
16. As shown in the figure, the direction indicated by light OA is.
Three. Solution: There are 7 questions in this question, with a total of 62 points.
17. Calculation:
( 1) 12+(﹣ 17)﹣(﹣23)
(2) .
18. Calculation:
( 1)﹣72+2?
(2)﹣ 14 .
19. Simplification: (1) 5a2+3ab ﹣ 4 ﹣ 2ab ﹣ 5a2 (2) ﹣ x+2 (2x ﹣ 2) ﹣ 3 (3x+)
20. Calculation:
( 1)7(3﹣x)﹣5(x﹣3)=8
(2) .
2 1. Given line segment AC=8cm, point B is the midpoint of line segment AC and point D is the midpoint of line segment BC, find the length of line segment AD.
22. The car travels 28 kilometers per hour when going uphill and 35 kilometers per hour when going downhill. The distance when going downhill is less than twice that of going uphill 14km, and it takes 12 minutes longer to go back than to go there. How many kilometers is the distance between uphill and downhill?
23. As shown in the figure, it is known that on the same plane, AOB=90゜,? AOC=60゜.
(1) Fill in the blanks:? COB =；
(2) What if OD is divided equally? BOC, OE split equally? AOC, just write it out? The degree of DOE is;
(3) Under the condition of (2), what if the topic is included? AOC=60゜ changed? AOC=2？ (? & lt45゜), other conditions remain unchanged, can you find it? If the degree of DOE is yes, please write out the solution process; If not, please explain why.
The seventh grade first volume Mathematics People's Education Edition final examination paper reference answer.
Multiple-choice question: This big question has 10 small questions, each with 2 points, totaling 20 points.
The reciprocal of 1 Yes ()
A.﹣·c.﹣2
The number of test sites is opposite.
Thematic standard questions.
The basis of analysis is that only two numbers with different symbols are opposite.
The inverse of the solution is.
So choose a.
This review mainly examines the definition of reciprocal, which is the basic question, and the concept of memory is the key to solving the problem.
2. The absolute value of-6 is equal to ()
C.﹣ D.﹣6
Absolute value of test center.
Special calculation problems.
Analysis can be answered according to the nature of absolute value.
Solution: According to the nature of absolute value,
|﹣6|=6,
So choose: a.
This question examines the nature of absolute value: the absolute value of a positive number is itself, the absolute value of a negative number is its opposite number, and the absolute value of 0 is 0, so the difficulty is moderate.
3. The polynomial 3x2﹣xy2 is ()
A. Quadratic quartile B cubic quartile C quadratic quartile D cubic quartile
Test center polynomial.
Analysis can solve problems according to the concepts of polynomial terms and degrees.
Answer: The polynomial 3x2﹣xy2 is cubic and quartic.
So choose d
This topic mainly examines the notes of polynomials, and the following concepts should be clarified for such topics:
(1) Each monomial that constitutes a polynomial is called a polynomial term; (2) The degree of the highest degree term in the polynomial is called the degree of the polynomial.
4. The following equations are known: Among them, the unary linear equation has ()
①x﹣2=； ②0.2x﹣2= 1； ③ ; ④x2﹣3x﹣4=0； ⑤2x = 0； ⑥x﹣y=6.
A.2 B.3 C.4 D.5
Definition of one-dimensional linear equation of test center.
An equation whose analysis contains only one unknown (element) and whose exponent is 1 (degree) is called a linear equation with one variable. Its general form is ax+b=0(a, b are constants and a? 0).
Solution: ① x-2 = is a fractional equation;
② 0.2x-2 = 1 is a linear equation with one variable;
③ It is a linear equation with one variable;
④ X2-3x-4 = 0 is an unary quadratic equation;
⑤2x=0 is a linear equation with one variable;
⑥ x-y = 6 is a binary linear equation;
Therefore, choose: B.
This topic mainly investigates the general form of a linear equation with one variable, which contains only one unknown, the exponent of which is 1, and the coefficient of the linear term is not 0, which is the focus of this kind of topic.
5. The solution of equation 3x+2 (1-x) = 4 is ().
A.x= B.x= C.x=2 D.x= 1
Try to solve the one-dimensional linear equation.
Special calculation problems.
Remove the brackets from the analytical equation, merge the shift terms, and transform the x coefficient into 1, and the solution can be obtained.
Solution: without brackets: 3x+2-2x = 4,
Solution: x=2,
So choose C.
The key to solving this problem is to understand the linear equation of one yuan and master the algorithm skillfully.
6. If the positions of corresponding points of real numbers A, B and C on the number axis are as shown in the figure, the following inequality holds ().
A.ac & gtbc B.ab & gtCB c . a+c & gt； b+ c d . a+b & gt； c+b
Real number and axis of test center.
Analyze the positive and negative situations of A, B and C according to the number axis, and then solve them according to the properties of inequalities.
Solution: As can be seen from the figure, A