Examination questions in the midterm of junior one mathematics.

1. Fill in the blank: (65438+ 0 point per space = 45')

1. Cube is surrounded by _ _ _ faces, with _ _ _ vertices and _ _ _ edges. A cylinder is surrounded by _ _ _ faces.

2. The smallest positive integer is _ _ _ _ _ _ _, and the largest negative integer is _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _.

3. If 5℃ above zero is recorded as +5℃, then 3℃ below zero is recorded as _ _ _ _.

4. If a < 0, then a _ _ _ _ 2a (fill in the blanks with, =).

5. In -74, the cardinal number is _ _ _ _ _ _ _ _, the index is _ _ _ _ _ _, and in (-2) 3, the cardinal number is _ _ _ _ _ _ _ _.

6.(- 1)2000=__________, (- 1)200 1=___________,- 12002=_____________。

7. The single digit of a two-digit number is A, and the ten-digit number is B. Please use an algebraic expression to indicate that this two-digit number is _ _ _ _ _ _ _ _ _ _ _ _ _ _.

8. In three consecutive even numbers, n is the smallest one, and the sum of these three numbers is _ _ _ _ _ _ _.

9. The reciprocal of-1.5 is _ _ _ _ _ _ _ _

10. A nonnegative integer with an absolute value less than 3 is _ _ _ _ _ _ _ _

1 1. The approximate value of 9.60× 106 is accurate to _ _ _ _ _ _, with _ _ _ _ digits.

12. Calculation:16-(-25)-24+(-20) = _ _ _ _ _

13. Calculation:-3.5÷ () × () = _ _ _ _ _ _ _

14. If, then X-Y = _ _ _ _ _ _ _

15. As shown in the figure: A and B are two numbers on the number axis, so = _ _ _ _ _ _

16. Specific size (1)-2000 0; ( 2)

(3)- -3. 144 (4)-

17. The coefficient of-3x2yz is degrees;

18. The number of cubes equal to -27 is,

19.-20030000 is expressed by scientific notation;

20. Numbers A and B are represented on the number axis, as shown:

Simplify | b | b-a |+|-a | =；;

2 1. An integer whose absolute value is not greater than 2 is;

22. In order to adapt to the market competition, if the price of commodity A is reduced by 10% on the basis of the original retail price, and then the price is reduced by A yuan, and the current price of each commodity is B yuan, then the original retail price of the commodity is _ _ _ _ _ _ _ _ _ _ _.

23. Column algebraic expression:

(1) The sum of the squares of the difference between a and 2b and the sum of three times the product of a and b is.

(2) There is a boy in Grade One (1) class, and the number of girls is half that of boys. If 80% of girls take part in extracurricular interest classes in mathematics, then the number of girls who take part in extracurricular interest classes in mathematics is 100%.

24. If axb and -3by+2a are similar terms, then x+y=

25.=( )

26.-0.5÷=( )

27.- 15÷×(-5)=( )

28.-32 + (-2) 2 =( )

29.( )

2. Multiple choice questions: (3 ′×13 ′ = 39 ′)

1. The only number whose reciprocal equals itself is ().

A.B- 1 c . 1，0 D. 1，- 1

2. The following dimensional relationship is correct ()

A.-3>-2 B. -22>(-2)3

C.>-2 D. >-(-2)

3. When, when, the value of the algebraic expression is ()

A.B. 2 C. 4 D。

4. A book, the first day 12 pages, the second day 56 pages, the second day 143 pages. If the book has ***x pages, then the equation listed is ().

A.B.

C.D.

5. Among the following four rational numbers: -22,,, the number of negative rational numbers is ().

A. 1 B. 2 C. 3 D. 4

6. In the following statement, ① If the sum of two numbers is 0, the two numbers are opposite to each other; ② The sum of two mutually opposite numbers is equal to 0; ③-3 equals 9; ④ The square is equal to16; ④ The absolute value is equal to 3; The above statement is correct ().

A.2 B. 3 C. 4 D.5

7. The reciprocal of the absolute value of a number is 0.5. This number is

A.-0.5; B. 0.5，-0.5； C. -2，2； Diameter-0.25

8. The following conclusions are correct.

A.- 1 is the smallest negative integer; B. -3. 1 >- 3. 14;

The reciprocal of c.4 is 0.25; D-(+7) is the inverse of -|-7|.

9.if a

A.b-a & lt； 0; B. ab & gt0; c . a+b & gt； 0; d . | a-b | & lt； 0

10.a is a rational number, and the following statement is incorrect.

A.(-a) times (-1) equals a;

B.a times (-3) equals-3a;

C.0 times a equals a;