Fill in the blanks. (1-4 0.5 points, the rest 1 points, ***24 points)

1、3.05m =( )cm 10.8m2 =( )dm2

6050cm3 =( )dm3 2800mL =( )L =( )dm3

2. Fill in the appropriate unit of volume or unit of volume in the brackets. A bucket of peanut oil is 5 () and the volume of an eraser is 6 ().

A truck can hold 20 ()

3. Both cuboids and cubes have () faces, () edges and () vertices.

4, 36 and 9, () is a multiple of (), and () is a factor of ().

5. Write all factors of 12 and all multiples within 50:

Factor: () times: ()

6, from 0, 5, 6, 7 three randomly selected, according to the requirements of four different three digits:

Odd number (); Multiplication of 3 ();

Even number (); It is a multiple of 3 and a multiple of 5 ().

7. The sum of the smallest natural number and the smallest prime number and the smallest composite number is ().

8. The sum of two prime numbers is 10, and the product is 2 1. They are () and () respectively.

9.2, 3 and multiples of 5, the minimum two digits are (), the maximum two digits are () and the minimum three digits are ().

10. When the side length of a cube is enlarged by 2 times, its surface area is enlarged by () times.

1 1, the sum of the sides of a cuboid and a cube is equal. It is known that a rectangle is 6 cm long, 5 cm wide and 4 cm high. The side length of a cube is () cm and the surface area is () cm 2. Compared with a cuboid, () has a larger volume.

12. Use a 36-decimeter-long iron wire to form the largest cube, and the volume of this cube is () cubic decimeter.

13, cut a cube with a side length of 8 decimeters into two cuboids with the same size to increase the surface area ()

Second, judge. (Mark "√" for the right and "×" for the wrong) (5 points)

1, all odd numbers are prime numbers. ( )

2. The sum of two prime numbers must be even. ( )

The multiple of a number must be greater than its factor. ( )

4. Subtract 1 from any odd number, and the result is even. ( )

5. Two cubes with side length of 1cm are spliced into a cuboid, and the surface area of the cuboid is 12cm2. ( )

Third, choose. (Please choose the serial number of the correct answer and put it in brackets) (12 points)

1, and the ratio between two adjacent unit volumes is ().

① 10 ② 100 ③ 1000

2. When the side length of a cube is expanded by 3 times, its volume is expanded by () times.

① 3 ② 9 ③ 27

3. A composite number has at least () factors.

① 2 ② 3 ③ 4

4. To make the three-digit "56□" divisible by 3, you can fill in the maximum number of "□" ().

① 7 ② 8 ③ 9

5. A rectangular piece of wood has a cross-sectional area of 9cm2. If you cut it into two sections, the surface area will increase by () cm2.

① 9 ② 18 ③ 27

6. In the plan below, the symbol () cannot be folded into a cube.

① ② ③

Fourth, calculation. (***25 points)

1, a number written directly. (9 points)

1.53-0.5= 7.8+0.9= 7.5-2.5=

12÷0.4= 0.56+4.44= 2.9+3.7+2. 1=

4×0.25= 1.25×5×8= 7.6×8+2.4×8=

2. Calculate as required. (2 points for each small question, *** 16 points)

(Figure 1) (Figure 2)

(1) Calculates the sum of the edges of a graph.

(Figure 1) (Figure 2)

(2) Calculate the surface area of the graph.

(Figure 1) (Figure 2)

(3) Calculate the volume of the graph.

(Figure 1) (Figure 2)

Verb (abbreviation of verb) operation (14 points)

1 Draw the other half of the graph to make it axisymmetric. (4 points)

2. Draw the symmetry axis of the following axisymmetric figures, as many as you can.

Some.

(4 points)