Step by step
The question
Question: find the volume of a box 7 long, 4 wide and 2 high.
1 Length × width × height
Volume is how much space is inside.
We count the 1 by 1 by 1 cubes that fit.
The volume of a box is V = length × width × height.
V = length × width × height
Now put the numbers in: length = 7, width = 4 and height = 2.
V = 7 × 4 × 2
7 times 4 is 28.
That is one layer of 28 cubes.
There are 2 layers.
So V = 28 × 2.
V = 28 × 2
28 times 2 is 56.
So the volume is 56 cubic units.
V = 56
Answer
V = 56