20 17 junior high school mathematics examination paper:
I. Fill in the blanks (28 points)
65,438+0,40,163,327 writes () and rewrites it into one hundred million units (), which is about () million.
2、( )%= 15? () = = 0.3: () = 0.75 = () times = () (fill in the simplest score)
Chen Ming goes to school from home every day. If he walks, it takes 15 minutes, and if he rides a bike, it only takes 9 minutes. The simplest speed ratio between walking and cycling is ().
4. During the physical examination, Chen Ming and his sister found that their weight was just equal to that of their sister, and the simplest integer ratio of their weight was ().
Chen Ming needs to spend 1 hour every day to finish his idioms, math and English homework. If each job takes the same time, it will take () points to complete each job, and each job accounts for () of the total time.
6. Chen Ming's school is called Zhenneng Primary School. As soon as you enter the school gate, you can see eight cylindrical marble columns of the same size in the hall. Each pillar has a radius of 5 decimeters and a height of 6 meters. If you want to clean these columns, the cleaning area is () square meters.
7. The track and field length of Chenming School120m. If you draw according to the ratio of 1: 2000, you need to draw () cm.
8. Teacher Chen Ming gave Chen Ming a math problem: () is greater than 20, and 16 is less than (). Please help him figure it out and write it in brackets.
9. There is a cylinder and a cone in the math teacher's teaching aid. The teacher told Chen Ming that a cylinder and a cone have the same volume and the same bottom area. The height of the cone is 12 cm. Please calculate that the height of this cylinder is () cm.
10, the construction team repairs roads, and repairs x meters every day. 10 days later, m meters remain. The () meter has been built, and the road is () meters long.
1 1, the ratio of three internal angles of a triangle is 2: 1: 1, and the largest angle of this triangle is ()? , is a triangle ().
12, the smallest prime number is (), the smallest composite number is (), the smallest natural number is (), the smallest odd number is (), the smallest even number is (), the largest factor of a number is (), and the smallest multiple is ().
The greatest common factor of 13, 18 and 69 is (), and the smallest common multiple is ().
14, 2, 5, 12, 8 are combined in pairs, and only those numbers whose common factor is 1 have () pairs.
15, a number is 9.0 after rounding, so the maximum number is () and the minimum number is ().
16. A rectangle rotates once along a long line to form (), and a right triangle rotates along a right side to form ().
17, Chen Ming's pocket money in the first half of this year is as follows:
June, January, February, March, April, May and June.
Currency (RMB)10090120100125150
His average pocket money every quarter is () yuan. March is ()% more than April.
18. Now there are balls of the same size in the pocket, including 3 white balls, 9 yellow balls and 3 red balls. Pick any ball from them.
The possibility of touching the white ball is (), and the possibility of touching the ball is 1/5.
19, (1) Take the pond culture Tang as the observation point, and the store is in the east-west direction () ()? In the direction of ...
(2) Taking the threshing floor as the observation point, Xiaohong's home is () 30? In the direction of ...
20. During the training, the throwing distance of A 10 is as follows (unit: meter).
A: Forty-four, forty-six, forty-eight, forty-seven, forty-six, forty-six, forty-five, forty-six, forty-six and forty-five.
The median of a is (), and the average is ().
2 1,. The side length of each square is a, the perimeter of the first graph is (), the perimeter of the second graph is (), and the perimeter of the nth graph is ().
22. Hours = () 4 tons and 70 kilograms = () tons.
9500 square meters = () hectares 4 square kilometers = () square meters
7200ml = () liters 2 cubic meters 200 cubic centimeters = () cubic meters.
Second, the judgment (5 points)
() 1, the circumference of a circle is proportional to its diameter.
() 2. Xiaoming soaked 20 seeds, and the result was 16 class germination, and the germination rate was 16%.
() 3. Two disjoint straight lines are parallel lines.
() 4. The radius of the semicircle is r and the circumference is (? +2)r .
() 5. Parallel lines are two non-intersecting straight lines.
() 6. 12℃ is 7℃ higher than -5℃.
() 7. Remove the 0 after the decimal point of 10.240, and the size of the decimal point remains unchanged.
() 8. Enlarge the radius of the circle by 4 times, the circumference and area by 8 times, and the volume of the cylinder by 16 times.
( )9、? 30% off Sell it after a 30% discount.
() 10, expand the side of the cylinder to get a square.
Iii. Selection (10 score)
1, in the learned statistical chart, to show the change of quantity, () statistical chart is best.
A, bar b, fan c, dotted line
2. At 1? There are () prime numbers in the natural number of 10.
a，3 B，4 c，5 d，6
3. The picture below shows the logo of Mitsubishi Motors of Japan, with () axis of symmetry.
a、 1 B、2 C、3 D、4
4. The score is equal ().
A, there is only one B, only two C's, countless D's, and nothing.
5, two ropes of the same length, the first cut it, the second cut the rice, and the rest ().
A, the length of the first root is b, the length of the second root is c and the same length is d, which is incomparable.
6, in the following figures, remove 0, the size remains the same ().
Answer, 0. 1 B、0.80 C、3.00
7, in the following years, there are 366 days in a year is ().
A: 1900b, 2000c, 1926.
8. The area of a square piece of land calculated on a map is 4 square centimeters, and the actual area of this piece of land is known as 1600 square meters. The scale of this picture is ().
A, B, C,
9, if the fraction can be converted into a finite decimal, x should choose ().
a、3、5、 10 B、3、 12、 18 C、2、 16、25
10, the following game () is unfair.
Flip a coin, heads up to win, tails up to win.
There are two yellow balls, three red balls and five balls in the box. Touch the yellow ball A to win, and touch the red ball B to win.
C. Rock, paper, scissors will win and lose.
Four, oral calculation (6 points)
1442? 7= 1.7+8.03= 0.42? 0.6=
0. 1? 0. 1? 0. 1? 0. 1= 6.5+4.5= 5.5? 0.3=
4.2? 1000= 53? 102= 22+82= 152? 19=
IV. Calculation (12)
( - )? 0.5? 2.5? 12.5? 64
( - ? 2)? 75%? [( 100%- )? 25%]
? + 125 8
Verb (abbreviation of verb) for solving equations: (3 points)
2X- =0.5 X+ X= x+5.6=9.4
6. Look at the picture and calculate according to the meaning of the question: (8 points)
1, find the area and perimeter of the shaded part.
2. Find the volume and surface area in the picture on the right.
Seven, smart and flexible will solve (28 points)
1, our school canteen bought 900 Jin of rice and ate it for six days 180 Jin. At this rate, how many days can I eat the rest?
2. One rope is 5.2m long, and the other rope is 20% longer. How long are these two ropes?
3. In 2000, the population of China was about 654.38+45 million, a decrease of 2% compared with 2005. What was the population of China in 2005?
On the map with the scale of 1: 250, a rectangular piece of land is 8 cm long and 5 cm wide. What is the actual area of this land?
5. After a 20% discount on a dress, it's cheaper in 200 yuan. What's the current price of this dress?
6. There is a cylindrical container with a base diameter of 4dm and a height of 8dm. This container is half filled with water. Now put a cone with a bottom radius of 2dm in it (all immersed in water). At this point, the water level in the container is exactly 8dm. What is the height of this cone?
7. A factory has two workshops, A and B, and the number of people in workshop A accounts for the number of people in both workshops. After 90 people were transferred from Workshop A, the ratio of people in Workshop A and Workshop B was 2: 3. How many people were there in the original two workshops?