Text-based sample

Text-based sample

Author: Mary Anastasi
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  1. Overview
  2. Background
  3. Practice
  4. Summary


  •  Learn about absolute value

  •  Practice finding absolute value

  •  Try a few examples in context


underline this

ABSOLUTE VALUE expresses the distance of any number from zero. You can take the absolute value of a positive number, a negative number, or zero.


[KEY TERM icon]  ABSOLUTE VALUE  The distance (also known as magnitude) a number is from zero on the number line; it is always a positive value.


[number line image]


If we start at 4, the distance to 0 on the number line is 4 spaces.  Therefore, the ABSOLUTE VALUE of 4 is 4.  We use vertical bars to show ABSOLUTE VALUE, so it would be written like this:

|4| = 4


The principle is the same with a negative number.  Using a number line, you start with the number and head towards 0, counting the spaces that you use. 

[number line image]


This example would be written as |-2| = 2.  This would read "the ABSOLUTE VALUE of negative 2 is 2."


 [BIG IDEA icon]  You can determine ABSOLUTE VALUE by using a number line, and counting the distance to zero.

Here are some examples:

|25| = 25

|0| = 0

|-12| = 12

|9/4| = 9/4

|-11.673| = 11.673

 [BRAINSTORM icon] Why is it that ABSOLUTE VALUE can never be negative?






(practice problems here)


(summary here)

Key Terms

(these will be generated by the system from the terms in the LPO)