Home > Do Mathematics -> K-7 Measurement and Geometry -> Absolute Value


Definition: The absolute value of a number is the distance between that number and 0.  
Rule: To show that we want the absolute value of a number, we put straight lines around it.

Interactivity: Absolute Value    Directions for Interactivity

  Click and drag the big blue point. The absolute value of the number is the length of the purple line segment.

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Examples
  • The distance between two points is always a positive value.
  • This means, the absolute value of a number is always positive. (Exception:|0|=0)

In the image above, there is a number line and 4 points Ѕ W Y Z.
In the image below is shown the way to calculate the absolute value.

Let's look at the points to the right of 0.  

  • The point Z represents the number 26.  The distance between Z and 0 is 26 (see below)  
    So the absolute value of 26 is 26. We write this sentence: |26=|26
  • Look at the point Y. Do you see that |19| =19 ?  

Now, let's look at the points to the left of 0.  

  • The point W represents the number -7, but the distance between W and 0 is 7.
    So the absolute value of –7 is 7 or |-7| =7 .
  • Look at the point Ѕ. Do you see that |-25| =25 ?
Metadata (includes links to downloads for offline)
Global Absolute Value
Brief InterActivity-Absolute Value for Whole Numbers between -10 and 10
Grade 7 and up
Strand Number Sense, Measurement and Geometry
Standard CA_7NS-2-5   ACT NS 20-23
Keywords absolute value, distance, number sense, measurement, geometry, algebra, dynamic, freeware, applet, offline, online
Comments none
Credits Zen Biker Maniac
Download All files zip
Author LFS - contact
Type Freeware - Available for Offline and Online Use - Translatable (html)
Use Requires sunJava player

Related Topics: Absolute Value Function

Home > Do Mathematics -> K-7 Measurement and Geometry -> Absolute Value