1. Fill in the blanks: (3 points for each small question, ***39 points)

The reciprocal of 1 and-is _ _ _ _.

2. Arrange rational numbers 0, 2.7, -4 and 0. 14 in descending order, and use "

3. If the East is positive, then the West is negative. When a car travels 3 kilometers to the east, it should be recorded as 3 kilometers, and when it travels 2 kilometers to the west, it should be recorded as _ _ _ _ _ _.

4. As shown in figure 1, it is the side schematic diagram of step 6. If you want to lay a carpet on the steps, it is known that the height of the steps is 1m and the width is 2.8m, so do you want to buy _ _ _ _ _ _ _ _ _ m carpet?

We know that division can be converted into multiplication, that is, dividing by a number is equal to multiplying the reciprocal of this number. Similarly, subtraction is also converted into addition: for example, a number minus -3 equals this number plus _ _ _ _.

6. The coal reserves on the earth are estimated to be more than 6.5438+0.5 million tons. If expressed by scientific notation, it should be _ _ _ _ _ _ _ _ tons.

7. The weight of a barrel of corn is about 45.2 kilograms. There is a pile of corn in the field, which is estimated to be equivalent to 12 barrel. It is estimated that this pile of corn weighs about _ _ _ _ _ _ _ kg (accurate to 1 kg).

8. The taxi fare standard in a city is: starting price 10 yuan, price per kilometer after 3 kilometers 1.8 yuan. Then someone who takes a taxi for x (x(x>3) kilometers will have to pay _ _ _ _ _ _ _ _.

9. Arrange polynomials in descending order according to the exponent of X (that is, descending order), which can be written as _ _ _ _ _ _ _ _ _ _.

10. As shown in Figure 2, draw a picture according to the following password: the cicada at point A in the picture advances 3 squares, then turns right 90, advances 5 squares, then turns left 90, advances 3 squares, then turns left 90, advances 6 squares, then turns right 90, and advances 65438. Draw Xiao Zhi's route with thick lines.

1 1. As shown in Figure 3, AD‖BC, ∠ B = 60, ∠1= ∠ C. Then ∠ C = _ _ _ _ _ _

12. In order to know how much electricity was used, Li Ming observed the degree displayed by the electric meter for several days in early June. The record is as follows:

Date 1 2 No.3, No.4, No.5, No.6, No.7, No.8

The electric meter shows (degrees)117120124129135138142.

It is estimated that the total electricity consumption of Li Ming's house in June is _ _ _ _ _ _ _ kWh. (Note: June is 30 days)

13, Einstein was born in 1879, 14 in March. These numbers together become 18793 14. Rearrange these numbers at will to form different numbers (for example,

37 148 19), in these two numbers, subtract the small one from the big one to get a difference, add up all the digits of the difference to get a sum, and then add up all the digits of the sum (until they can't be added up), and the final result is _ _ _ _ _ _ _ _. Write your date of birth on the imitation.

Second, multiple-choice questions: (4 points for each small question, ***24 points)

14. The result of calculation is ()

(1)-3; (B)- 1； (C) 1； (D)3。

15. The cube shown in Figure 4, if expanded, can be () in the following figure.

16. As shown in Figure 5, if ∠ 1=∠5, the angle * * equal to ∠2 has ().

1； (B)2； (C)3; Four.

17. Known: a=2, =3. The point on the number axis that represents rational number b is

On the left of the origin, the value of a-b is ()

(1)-1; (B) 1； (C)5； (d)- 1 or 5.

18. If the circumference of a rectangle is 2 cm and the length of one side is 4 cm, then its area can be expressed as ().

(A-4)； four (a-4); (B)4(a-8)； (C)4a； (D)4(2a-8)。

19. Among the following things, it is inevitable that ()

(a) The sum of two rational numbers is a positive rational number;

(b) The average temperature in winter is lower than that in summer;

(c) There are 30 days in February;

(d) Two balls are randomly selected from the bag containing four red balls and four yellow balls. They are all yellow balls.

Three. Answer: (***87 points)

20.(8 points) Calculate -2-(-3)+(-8)

2 1.(8 points)

22.(8 points) Calculation

23.(8 points) Calculation

24.(8 points) Known and evaluated.

25.(8 points) Simplify before evaluating:, in which.

26.(8 points) (1) As shown in Figure 6, the following is three views of a three-dimensional diagram drawn by a classmate.

Please answer that this stereogram is _ _ _ _ _ _ _.

Please draw three views of the four pyramids in Figure 7.

27.(8 points) As shown in Figure 8, the number of times AE‖BD, ∠B=, ∠A= and ∠C is known.

28.( 13 minutes) A car travels back and forth along a north-south expressway, starting from place A in the morning and finally arriving at place B in the evening. It is agreed that the north is the positive direction (for example, +7. 1 means that the car is heading north 7. 1 km, and -9.5 means that the car is heading south 9.5 km), and the driving record of that day is as follows (for example,).

+ 180.3,-90.5,+70. 1,+ 140,-60.2,+ 130,-60.8,-80.5.

Please answer the following questions according to the calculation:

(1) How many kilometers has this car traveled? Where is B in A, and how many kilometers apart?

(2) If the car consumes 3.35 liters of oil per kilometer, how many liters will it consume this day? (The result retains two significant figures)

(3) Please add conditions (only time and speed are allowed) according to the scenario provided by the question, put forward an available formula: distance = time× speed, and solve it.

29.( 13) Figure 10 is a histogram of the number of medals won by China in the Olympic Games made by a classmate in Excel. Please complete the following questions as required:

(1) How many Olympic medals did the student count? As can be seen from the picture, which session of China won the most medals? Which session has the least number of gold medals?

(2) Please draw a dotted line statistical chart of the total number of medals won by China Olympic athletes in Figure 9;

(3) 1984 When China participated in the 23rd Summer Olympic Games for the first time, Xu Haifeng, a shooter from China, made a breakthrough in the Olympic gold medal for China with his gun. In which year and which Summer Olympic Games did the China delegation win the100th medal and gold medal? Do you know who won the gold medal? (If the answer to this question is incorrect, no points will be deducted; if the answer is correct, 2 points will be added. )