Math: perfect cubes and cube roots

Tutoring math, you notice that while square roots are familiar to most people, cube roots are less comfortable for many.  The math tutor offers some clarification….

A perfect square is a number like 25 or 49 that you can arrive at by multiplying a number by itself:

5×5=25

7×7=49

A perfect cube is a number like 8 or 125 that you can arrive at by multiplying a number by itself and then by itself again:

2x2x2=8

5x5x5=125

The cube root of a number is what you times by itself, then by itself again, to get that number:

∛125 = 5      because      5x5x5=125

∛1000=10    because      10x10x10=1000

You can have other roots as well:

∜81=3          because       3x3x3x3=81

There will be more about roots and powers in upcoming posts:)

Jack of Oracle Tutoring by Jack and Diane, Campbell River, BC.

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