The common factor of 1, 8 and 10 is (), and the least common multiple is ().

2. According to statistics, by the end of 20 1 1, the permanent population of Yangzhou * * was 64,459,760, which was written as (), and the mantissa after omitting this number "ten thousand" was about () ten thousand.

3, () liter () ml = 4050ml 6.25h = () min

4, more than 45 kg, 20% is () and less than 30 tons is () tons.

5, there is a ratio, its two external terms are 0.5, then its product of two internal terms is ().

6、0.75 =( )÷( )= 3∶( )= =( )%

The ratio of 7.0.25 to the simplest integer is (), and the ratio is ().

8. The scale of the map is 1: 2000000, and the scale of rewriting into line segments is ().

On this map, the distance between A and B is 15cm, and the actual distance between A and B is () km.

9. Five integers are arranged from small to large, and the median is 7. If the mode in this set of data is 4, the minimum sum of these five integers is ().

10, this year's Arbor Day, students planted 180 trees, and 20 trees did not survive. Later, we replanted 20 trees, all of which survived. The survival rate of students planting trees this year is ().

a

b

1 1. The picture on the left shows Mr. Wang downloading a file on the computer. The computer shows that it takes 25 minutes to download this file, so it will take () minutes to download.

12 As shown in the figure, four identical right triangles form a square.

It is known that a∶b= 1∶2, and the area of the shaded part accounts for () of the area of a large square.

13, a businessman marked a piece of clothing as 680 yuan, which was recognized by counterfeiters.

If you sell them to 100 yuan, you can still earn 25%. If you sell at the original price, you can earn () yuan per piece.

14. If the height of a cylinder is reduced by 2cm, its surface area will be reduced by 25.12cm2. The bottom area of this cylinder is () cm 2, and its volume will be reduced by () cm 3.

15,240 people went for a spring outing and wanted to prepare some drinks. The store's "discount notice" says that six empty bottles can be exchanged for one bottle of drinks, and 240 people can buy at least () bottles of drinks, which can ensure that everyone drinks one bottle.

Second, compare repeatedly and choose carefully. (5 points)

1, please estimate that () is closest to your age.

A, 600 minutes b, 600 weeks c, 600 hours d, 600 months.

2. A miniature part, drawn on the drawing, is 0.5mm long and 5cm long. The scale of this picture is ().

a、 1∶ 10 B、 10 ∶ 1 C、 1∶ 100 D、 100∶ 1

3. If the number of red flowers is less than that of yellow flowers, then the following statement is wrong ().

A. The number of yellow flowers is 20% more than that of red flowers. B. The ratio of safflower to yellow flower is 6∶7.

C If the number of red flowers is increased, the number of two kinds of flowers is the same.

D. the number of safflower flowers accounts for the total number of two kinds of flowers.

4. The two related quantities in the following questions are directly proportional to ().

A, the writing speed per minute is constant, the total writing times and time b, the area and radius of the circle.

C, a section of road, the number of meters repaired every day and the number of days used d, the side length and area of the square.

5. The picture on the left is made up of five identical cube blocks, and the graph seen from above is ().

Third, I am the best! (27 points)

1, a number written directly. (4 points)

1-35%= 69× 10%= 0.4 = 2÷ 10%=

30%×0. 1= 25%÷ = 50%- = 1- 1÷6=

2. Find the unknown χ. (8 points)

40% X-20 = 140 X+80% X = 54∶∴=

3. Calculate the following questions, which can be simply calculated in a simple way. (12)

25× 12-850÷ 17 15+5÷(-) 3.2× 12.5×2.5

7.05-3.84-0. 16- 1.05 ×9-8÷ ×[ 2÷( )]

5. The picture below shows the surface development of a cylinder "canned beef". Please calculate the volume of this cylinder "canned beef". (Ignore the thickness of iron sheet) (3 points)

Fifth, the operation problem. (6 points) Draw graphics as required. (The side length of each small square is defined as 1 cm)

B

①

A

(1) Enlarge Figure ① according to the ratio of 2: 1, and the corresponding position of point A in the enlarged figure is (3, 10).

(2) Rotate the figure ① clockwise by 90 degrees around the point A, and then translate the rotated figure eastward by 8 cm.

(3) Draw a trapezoid with the same area as Figure 1.

Sixth, solve the problem. (27 points)

1. The waterway from Shanghai to Wuhan is long1075km. The two ships set out from Shanghai and Wuhan at the same time and met on the way 25 hours later. It is known that the speed of ships sailing from Shanghai is 19 km/h, so what is the speed of ships sailing from Wuhan? (4 points)

2. A primary school donated 56,000 yuan to help the earthquake-stricken areas in Sichuan. The teacher donated 56 thousand. How much did the teachers and students donate? (4 points)

3. Xiaojun's father published an article of about 80,000 words, and the manuscript fee was 0. 1 yuan per word. According to the regulations, he should pay 20% income tax. How much can Xiaojun's father actually get? (4 points)

4. Dig a cylindrical pool with an inner diameter of 6m and a bottom depth of1.5m.. If a layer of cement is coated on the inside and bottom of the pool, what is the area of the cement surface? If this pool is full, how many cubic meters of water can it hold? (5 points)

In order to support the disaster area, several young volunteers raised 40 tons of relief materials, which were transported to the disaster area by two big trucks and six small trucks. It is known that the load of each small truck is the load of a large truck. What is the load capacity of each big truck and each small truck? (5 points)

7. There are some long tables in the reading room for reading extracurricular books (pictured). If each long table is placed separately, up to 6 people can read at the same time. If two long tables are placed side by side, at most 65,438+00 people can read at the same time ... (5 points)

(1) According to this arrangement, complete the following table.

Number of sheets placed/sheet

1

2

three

four

…

Accommodation number/person

six

10

…

(2) According to this arrangement, 10 long tables can be placed, which can accommodate people at most.

(2) According to this arrangement, 22 people need a long table.

(3) According to this arrangement, N long tables can accommodate people at most.

Seven, statistics. ( 10%)

a plane

B plane

The following is a record of the flight time and altitude of two model aircraft by the model aircraft team during a flight.

1. Plane A flew for () seconds, and plane B flew for () seconds. The flight time of plane A is longer than that of plane B.

2. From the picture, the altitude of 10 second after take-off of plane B is () meters, and the two planes are at the same altitude () seconds after take-off, and the height difference between the two planes is about () seconds after take-off.

3. When flying from plane A to () meters, it begins to descend () seconds after takeoff; B The plane stayed in the air for () seconds before descending.

4. What else do you know from the picture?