Seventh grade math test paper
Class name, seat number and grade
(Note: the whole paper will be completed in 80 minutes, with full score 100).
Multiple choice questions (2 points for each small question, 20 points for * * *)
() 1. In the following logarithm, the opposite is:
A. and 2 BC
() 2. The following formula: where the number of algebraic expressions is:
A.6 B. 5 C. 4 D. 3
() 3. If the square of a number is equal to its reciprocal, then this number is:
A.1B.-1C.1D.1and 0
() 4. The following calculation is correct:
A.B. C. D。
() 5. The rational numbers corresponding to points A, B, C and D on the number axis are all integers. If point A corresponds to rational number A and point B corresponds to rational number B, and b-2a=7, the origin on the number axis should be:
A.a. point B.B. point C.C. point D.D.
6. If =
A. the sixth century BC.
() 7. The following statement is correct:
A.B.
C.D.
() 8. The solution of equation 1-3y=7 is:
A.B. C. D。
The seventh grade math page 1 * *1
() 9. When adding a polynomial, the polynomial is:
A.x3+3xy 2 b . x3-3xy 2 c . x3-6x2y+3xy 2d . x3-6x2y-3x2y
An x w -2 3
() 10. if b c stands for "A-B+C" and y z stands for "x-y+z+w", then × 3-6.
The calculation result is: a.b.c.d
Fill in the blanks (2 points for each small question, 20 points for * * *)
1 1. The sum of integers whose absolute value is not less than 1 but less than 3 is _ _ _ _ _ _ _ _;
The absolute value of the reciprocal of 12. -Yes _ _ _ _;
13. If A and B are reciprocal, and C and D are reciprocal, then 2a+3cd+2b = _ _ _ _ _ _;
14. expressed by scientific notation: 2007 should be marked as _ _ _ _ _ _;
15. The coefficient of a single item is _ _ _ _ _ _, and the number of times is _ _ _ _ _ _;
16.______;
17.______;
18. If 5x+3 and -2x+9 are reciprocal, then the value of x-2 is _ _ _ _ _ _;
19. The price of each A-yuan coat will be increased by 10% first, and then the price will be _ _ _ _ _ _ yuan/piece after a 10% discount;
20. Observe the picture on the right and fill in the table below.
The number of trapezoids is 1 23...n
Graphic perimeter 5 a 8a 1 1a …
Three calculations (4 points for each small question, ***24 points)
2 1) 22)
Seventh grade math page 2 *** 1
23) 24 )
25) 26)
4. Solve problems (6 points for each small question, *** 18 points)
27. Simplify before evaluating. In ...
28. Solve the following equation and test it.
Seventh grade math page 3 *** 1
Solve application problems with five-column equations (6 points for each small question, *** 12 points)
30. Distribute a batch of books to the students in Class 7 (1 1). If each student is assigned three books, then the remaining 20 books are left.
If everyone is given four books, there will be 25 fewer. How many students are there in this class?
3 1. Xiaoming goes to the stationery store to buy a pencil. The shopkeeper said, "If you buy too much, you can get a 20% discount." Xiao Ming calculated.
If you buy 50 pencils, it will be cheaper than the original price, 6 yuan. What is the original price of each pencil?
Six answering questions
32.
Additional questions (each small question 10, ***20, not included in the total score)
1. A column number is arranged as 1,-3,5,-7,9, ... If the sum of three adjacent numbers is -20 1, how do you find these three numbers?
calculate
Seventh grade mathematics page 4 *** 1
Mid-term exam in the first semester of 2007 ~ 2008 school year.
Seventh grade mathematics examination paper (answer)
I. Multiple choice questions
1)D2)C3)a4)C5)C6)D7)b8)C9)C 10)B
Step 2 fill in the blanks
1 1)0 ; 12) ; 13)3 ; 14)2.007× 103 ; 15) ,3 ;
16)0 ; 17)-2 ; 18)-6 ; 19)0.99 a； 20)3an+2a；
Three. Computational problem
Step 4 solve the problem
When m=900, (person)
5. Solving application problems with equations
30) solution: suppose there are x students in this class, according to the meaning of the question:
3x+20=4x-25
X=45 A: There are 45 students in this class.
3 1) solution: let the original price be x yuan, according to the meaning of the question:
( 1-0.8)x×50=6
Solution: x=0.6 A: The original price is 0.6 yuan.
Step 6 solve the problem
Other issues
1. solution: let one of the three numbers be x, according to the meaning of the question:
-(x-2)+x-(x+2)=-20 1
Solution: x=20 1
∴-(x-2)=- 199，-(x+2)=-203
A: These three numbers are-199, 20 1 and -203.