8th Grade · Expressions & Equations
Perfect Cube
8.EE.A.2
Definition
A number that is the product of an integer used three times as a factor. Its cube root is a whole number.
Examples
- 27 is a perfect cube because 3×3×3=27.
- 1, 8, 27, 64, 125 are all perfect cubes.
Key rule
The cube root of a perfect cube is always a whole number.
Memory hook
An integer, cubed.