The reciprocal of 1 and -2 is.
Please write two rational numbers at will.
Please write two quantities with opposite meanings at will.
4. The number whose square equals 64 is.
5、(-)3= .
6. If | x |- 1 = 4, then x=.
7. "21point game": use the following numbers to score 24 points (each number can only be used once).
2, 6, 7, 8. Formula.
Second, multiple-choice questions (3 points for each question, *** 15 points)
1, in the section of a cuboid, the polygon with the least number of sides is ().
A. hexagon B. pentagon C. quadrilateral D. triangle
2. If a two-digit number is A and a ten-digit number is B, then this two-digit number can be expressed as ().
10a+b d 10b+a
3. Among the following logarithms, the one with equal value is ().
A.32 and 23b. -23 and (-2) 3c. -3 and (-3) 2d. (-3× 2) 3 and -3× 23.
4.① The -A in the following statement must be negative; ②|-a|-a | must be a positive number; ③ The reciprocal is1; The number whose absolute value equals itself is 1. The correct number is ()
1。
5, if the original price of a commodity is one yuan, after the price increase of 10%, if you want to restore the original price, you should reduce the price ().
A.B. C. D。
Fourth, draw 0, -0. 1, -6, and use ">" in order from small to large. Connect. (6 points)
Calculation and evaluation (5 points for each small question, *** 15 points)
1、- 12-×[(-2)3+(-3)2] 2、÷(0.25-)
8. As shown in the figure, the number whose distance from point A on the number axis is equal to 5 is.
9. A car has 30 seats and is empty. There are 2 passengers at the first station, 4 passengers at the second station and 6 passengers at the third station, and then go down in turn, the first passenger at the N station; If no one gets off the bus halfway, the bus will be crowded with passengers when it arrives at the station.
Student 10, A, B and C observed a house. Mark what students A and C see in the picture. Please mark in brackets what student B sees and what you think is correct.
Problem solving (10)
The picture shows a rectangular entertainment place, and the picture shows the scheme designed by Xiao Liang. Among them, the semi-circular rest area and the rectangular swimming pool are green spaces.
(1) What are the areas of the swimming pool and the rest area?
(2) What is the green area?
(3) If this entertainment place needs more than half of the green space, and its length is 1.5 times the width, and the length and width of the swimming pool designed by Xiao Liang are half of the length and width of the big rectangle respectively, do you think his design is reasonable? Why?