3÷0.75= 1.62÷0.54= 3.5×4= 4- 1.04=

Fill in the blanks. (18)

1. A cuboid has () sides, () faces and () vertices.

2. A cube is a three-dimensional figure surrounded by six identical ().

3. According to whether a number is a multiple of 2, natural numbers can be divided into () and ().

4. The sum of two prime numbers is 20 and the product is 9 1. These two prime numbers are () and () respectively.

5, () is neither a prime number nor a composite number.

6, at the same time is a multiple of 2 and 5, the minimum two digits is ().

The maximum multiple of 7 and 25 is (), and the minimum multiple is ().

8. The length, width and height of a rectangular wooden box (without cover) are 40cm, 30cm and 50cm respectively. If you want to paint with green paint, the painted area is () square decimeter.

9. The sum of the side lengths of a cuboid and a cube is equal. Given that the length, width and height of a cuboid are 7dm, 6dm and 2dm respectively, then the side length of the cube is () dm.

10. In the natural number 1-9, () and () are two adjacent prime numbers, and () and () are two adjacent composite numbers.

Third, the judge. Mark "√" for the right and "×" for the wrong. ) (6 points)

1. Take a picture of a cuboid, and you can take up to 3 faces. ( )

2. The length of three sides of a cuboid is called the length, width and height of the cuboid. ( )

3. All even numbers are composite numbers. ( )

4. The minimum factor of a number is 1, and the maximum factor is itself. ( )

5. A cuboid has at most four square sides. ( )

6. In an axisymmetric figure, the distance from the corresponding symmetrical point to the axis of symmetry is equal. ( )

Fourth, multiple-choice questions, choose the correct answer and fill in the brackets. (6 points)

1. Fold a piece of paper four times in a row, and the paper has () layers.

①6 ②8 ③ 16

2, the product of the multiplication of two prime numbers ()

① It must be a prime number ② It must be a composite number ③ It may be a prime number or a composite number.

3. With a 52 cm wire, you can just weld it into a cuboid teaching aid with a length of 6 cm, a width of 4 cm and a height of () cm.

①2 ②3 ③4 ④5

4. Use three cubes with side length of 1 decimeter to make a cuboid with surface area ().

(1) unchanged; (2) reduced by 2 square decimeters; (3) reduced by 4 square decimeters.

5. A cuboid can be just cut into three cubes, and the sum of the cut faces of the three cubes is () 4 faces.

① Increase ② Reduce ③ Uncertainty

6. The pointer rotates 60 degrees counterclockwise from 12 to ().

①2 o'clock ② 10 point ③ 1 1 point.

5. calculation. (24 points)

1, simple calculation. (12)

1.25× 10.7×8 10-(0.56×8.3+0.44×8.3)

49.8×2.73+2.73×50.3+0.273 14 14÷3.5

2, solve the equation (12 points)

5x+7=42 x÷4.2=2

3.6x - x=3.25 2(x - 3)=5.8

Six, calculate the following chart area. (8 points)

3 decimetres

4 decimeters

5 decimeters

6 cm

6 cm

6 cm

Seven, application questions. (20 points)

1, there are 34 pears, which are distributed to 6 children on average. How many pears do you need to eat?

2. The sum of three consecutive even numbers is 120. What are these three even numbers?

3. A cuboid iron box, length 18cm, width 15cm and height 12cm. How many square decimetres of iron does it take to make this tin box?

4. How many decimeters of wire do you need to enclose three cuboid models with length, width and height of 6 decimeters, 4 decimeters and 3 decimeters respectively?

5. In the campus of Rongxin Primary School, there is a square experimental field with a side length of 9 meters, with an average potato 1.5 kg per square meter. How many kilograms of potatoes are collected in this experimental field?

Eight, small designer (10)

1. Draw the graph of triangle OAB rotating 90 clockwise around point O and the graph of 180.

2. Draw an axisymmetric figure.

Nine, thinking training (additional 5 points)

1, the kindergarten bought 30 stools and one * * 174 yuan. The big one with 9 yuan and the small one with 3 yuan bought () a big stool and () a small stool. (2 points)

2. A ball falls from the height of16m, and bounces back to half its original height every time it lands. When the ball landed for the fifth time, * * * passed () meters. (3 points)