Introduction to Inequalities
Inequality tells you about the relative size of two values.
Mathematics is not always about "equals"! Sometimes you only know that something is bigger or smaller
Example: Alex and Billy have a race, and Billy wins!
What do we know?
We don't know how fast they ran, but we do know that Billy was faster than Alex:
Billy was faster than Alex
We can write that down like this:
b > a
(Where "b" means how fast Billy was, ">" means "greater than", and "a" means how fast Alex was)
Greater or Less Than
The two most common inequalities are:
Symbol | Words | Example Use | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
> | greater than | 5 > 2 | ||||||||||||
< | less than | 7 < 9 | ||||||||||||
. Or Equal To!You can also have inequalities that include "equals", like:
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