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# Text-based sample

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Author: Mary Anastasi

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Tutorial

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

## Overview

•  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 here)

## Key Terms

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