Math A

Absolute Value

 

The absolute value of a number can be considered as the distance between 0 and that number on the real number line.
 

Remember that distance is always a positive quantity (or zero).  The distance in the diagram above from +4 to 0 is 4 units and the distance from -3 to 0 is 3 units.  These units are never negative values.

We write this as

 

The rule for computing absolute value is:

 

Examples:

 

 

 

 

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Roberts