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.

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 down all factors of 12 and all multiples within 50 of 12:

Factor: () times: ()

6. Numbers with () in the unit have both a factor of 2 and a factor of 5.

7, 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 ().

8. The smallest prime number is (), the smallest composite number is (), and the smallest composite number in odd numbers is ().

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

10 The sum of the minimum natural number and the minimum prime number and the minimum composite number is ().

1 1 is a multiple of 2, 3 and 5, with the least two digits being (), the most two digits being () and the least three digits being ().

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

13, the sum of the side lengths 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.

14. When we observe an object, we usually look at it from (), () and ().

15. Divide the unit "1" into 15 copies, indicating that the number of such two copies is (), and its decimal unit is (). Five-eighths of writing () means one-eighth of ().