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 ().

Front view, left view and top view

(a) cylinder (b) prism (c) cone (d) sphere

9. In a certain area, the temperature is -7℃ in the morning, rising by 1 1℃ at noon and dropping by 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 >-4C 、< 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 the top view of the geometry composed of several small cubes. The number in the small square indicates 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)