Units: unit of volume for solids is the same as unit of volume, while unit of volume for liquids and gases is generally liters and milliliters.

Volume and volume are two different concepts. They are different:

1 has different meanings. For example, the volume of an iron drum refers to the size of the space it occupies, and the volume of this iron drum refers to the number of objects it contains. An object has a volume, but it doesn't necessarily have a volume.

2. The measurement methods are different. Generally speaking, before calculating the volume of an object, its length, width and height should be measured. The volume of an object is measured from the outside, but the volume is measured from the inside. A closed object with both volume and volume must be larger than its volume.

3. The company names are not exactly the same. Unit of volume generally uses: cubic meters, cubic decimeters and cubic centimeters; Solid unit of volume is the same as unit of volume, while liquid and gas in unit of volume and unit of volume are generally liters and milliliters.

The volume of an object should be greater than its volume.

5. Formula:

V cuboid =abc (length× width× height)

V cube = a 3 (side length × side length × side length)

V cylinder =sh (bottom area × height)

V-cone = 1/3sh( 1/3× bottom area× height)

6. To measure the volume of liquids, such as water and oil, liters and milliliters are commonly used, and they can also be written as L and ml.

7. Calculate the volume of an irregular three-dimensional figure and put the object into the water. Use the current volume-the volume of the object that has not been put in is the volume or the height-length * width of the object that has not been put in (1 liter = 1 cubic decimeter; 1 ml = 1 cm3)