The seventh grade mathematics comprehensive test one
Time: 90 minutes, total score: 120 points, birthright.
Title 1 2 3 4 5 score
I. Multiple choice questions (5× 3 ′ =15 ′)
The reciprocal of 1 -3 is ()
3rd century BC to 3rd century BC
2. "The number 2 is greater than a" means ()
A.a+2b a+2c a+2d a-2
3. The following calculation is correct ()
A.B. C. D。
The result of 4. 2-(-8) is ()
a . 6 B- 6 c . 10d .- 10
5. The solution of binary linear equations is ()
A.B. C. D。
Fill in the blanks (10× 3 ′ = 30 ′)
6. The multiplication rule of rational numbers is: multiply two numbers with the same sign and different signs,
Multiply any number by zero.
7. In 23, 3 is, 2 is and the power is; If 3 is regarded as a power, its cardinal number is,
The index is.
8. The rational number whose square equals 36/49 is; The number whose cube equals -27/64 is
9. Write down the following figures in scientific notation: 4000 =; 950000= ;
10. Write down the precision and significant figures of the following approximate values obtained by rounding:
(1) Approximation number 85 is accurate to the right, and the effective number is;
(2) The approximate number is 30000, and the effective number is;
1 1.(- 1)200 1=
12. If -2x= 10, then x=
13. Let the reciprocal of A be the largest negative integer and the absolute value of B be the smallest number, then b-a=
14. When n = _ _ _ _ _, 3x2y5 and -2x2y3n- 1 are similar terms.
15. Given that the polynomial is a polynomial of degree 5, then m = _ _ _ _ _ _ _ _ _ _ _ _
3. Calculation problem (8× 5 ′ = 40 ′)
16. 17.
18. 19.
20.2 1.(-24 )÷6
22.23.-6+(-3)×(+25)
4. Solve the problem (5× 7 ′ = 35 ′)
24. As shown in the figure, draw a pattern with a toothpick according to certain rules:
① ② ③
(1) Fill in the form according to the rules shown in the figure:
Graphical labels ① ② ③ ... Participation
The number of toothpicks.
(2) You need _ _ _ _ _ _ _ _ _ _ _ _ _ toothpicks to get the nth number.
25. Simplify before evaluating: 4x3-[-x2+2( x3-x2 )], where x= -3.
26. Solve the equation: x -7= 10-4( x+0.5)
27. A math contest has 20 questions. Answer one question correctly and get 5 points. If you don't answer or answer a wrong question, you won't be deducted, but you will be deducted 3 points. How many questions do you have to answer correctly to get 84 points?
28. In the past, female students in the extracurricular mathematics group accounted for the whole group. Later, four female students joined the group, accounting for the whole group. Ask how many students there are in the extracurricular math group.
Verb (abbreviation of verb) Other problems (10')
solve an equation