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Text-based sample

Text-based sample

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Author: Mary Anastasi
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Tutorial

Contents

  1. Overview
  2. Background
  3. Practice
  4. Summary

Overview

  •  Learn about absolute value

  •  Practice finding absolute value

  •  Try a few examples in context

Background

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

(practice problems here)

Summary

(summary here)

Key Terms

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