The examination time is 90 minutes, 100, and the examination is divided into examination paper and closed book.

Class-

Name-achievement.

I'll fill in (22 points)

1, it takes () cubes with side length 1 m to make a big cube with side length 1 m.

2, can be divided by 2 and 5 at the same time the characteristics of the number ().

3. Among the natural numbers from 1 to 10, odd numbers have (), even numbers have (), prime numbers have (), and composite numbers have ().

4, 3.68 cubic decimeter = () liters

354 ml = () cubic centimeter = () liter

7800 cubic decimeter = () cubic meter, 0.85 cubic decimeter = () cubic centimeter.

5. A cuboid has () faces, () vertices and () edges.

6. The volume of a pencil box is about 400 ().

7,2× 3 = 6, 2 and 3 are 6 (); 6 is the () of 2 and 3.

8. Three consecutive odd numbers, one of which is A, and the other two are () and () respectively.

9. Of the five numbers14, 15, 18, 20, 5 1, the number that is a multiple of 2 is (); A number that is a multiple of 3 is (); A number that is a multiple of 5 is ().

Second, I will judge (10)

1 and even numbers only 2 are prime numbers. ( )

2. Two cubes with the same volume must have the same surface area. ( )

3. Among triangles, only isosceles triangles or equilateral triangles are axisymmetric figures. ( )

A cube with a side length of 6 meters has the same surface area and volume. ( )

5、a3=3a .

( )

Third, I will choose (10)

1. A wooden box with a length of 2m, a width of 2m and a height of 3m is laid flat on the ground, with an area of at least (

)。

A, 6 square meters b, 6 cubic meters c, 4 square meters d, 4 cubic meters

2. The sum of two odd numbers must be ().

A, even b, odd c, prime d, prime.

Drink 250 () milk every morning in winter and winter.

Weight, pounds, milliliters, kilograms

4. At least () identical small cubes can be combined into a big cube.

a，8 B，4 C，2 D， 16

5. Divide a cube block with a side length of 5 decimeters into two identical cuboids, and the sum of the surface areas of the two cuboids is () square decimeters.

a、 150 B、200 C、300 D、 175

Fourth, I can calculate and draw. (28 points)

The surface area and volume of cuboids and cubes below 1. Unit: centimeter (12 minutes)

Please write down the multiple of 3 within 20 and the factor of 16 respectively. (10)

Please draw a right triangle, and take one of its right sides as the symmetry axis, and draw a symmetrical figure of this right triangle. (6 points)

Five, I'll solve it. (30 points)

1. A shoe factory produced 12 days in the first half of July, with an average of 350 pairs of shoes per day, and produced 13 days in the second half of July, and * * * produced 4,500 pairs of shoes. How many pairs of shoes are produced on average every day? (4 points)

2. A cuboid room, 6 meters long, 4 meters wide and 2.5 meters high. Now it is necessary to paint its four walls and ceiling (doors and windows account for 8 square meters). What is the paint area of this room? (5 points)

A cuboid reservoir is 20 meters long, 2 meters wide and 3 meters deep. How many liters of water can it hold at most? (5 points)

4. Forging a cubic billet with a side length of 0.5m into a rectangular steel with a cross-sectional area of 0. 1 m2. How long is forged steel? (solved by equation) (5 points)

5. A fuel tank is 5 decimeters long, 3 decimeters wide and 1.5 decimeters deep. Each liter of diesel oil weighs 0.82 kg. How many kilograms of diesel can this tank hold at most? (5 points)

6. Xiaoming has a coral stone. He wanted to know the volume of this coral stone, so he found a water tank with a length of 20㎝, a width of 15㎝ and a depth of 6 cm, and gently submerged the coral stone in the water tank. At this time, the water depth in the water tank was 8㎝, and Xiao Ming quickly calculated this coral stone. Can you write Xiao Ming's calculation process? (6 points)