Step by step
The question
Question: find the volume of a cube with sides 5.
1 Side × side × side
Volume is how much space is inside.
We count the 1 by 1 by 1 cubes that fit.
All the sides of a cube are the same.
So the volume is V = side × side × side.
V = side × side × side
Now put the numbers in: side = 5.
V = 5 × 5 × 5
5 times 5 is 25.
That is one layer of 25 cubes.
So V = 25 × 5: 5 layers of 25.
V = 25 × 5
25 times 5 is 125.
So the volume is 125 cubic units.
V = 125
Answer
V = 125