# Introduction to absolute value

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##### Intros
###### Lessons
1. Introduction to Introduction to Absolute Value
2. What is an absolute value?
3. Absolute value of an expression
##### Examples
###### Lessons
1. Evaluate the Absolute Value of a Number

Evaluate the following absolute values:

i. Using a number line

ii. algebraically

1. |8|
2. |-8|
3. |0|
4. -|5|
5. -|-5|
2. Evaluate the Absolute Value of an Expression

Evaluate the absolute values of each of the following expressions:

1. |10-2|
2. |2-10|
3. -|3-5|
3. Comparing Numbers Using Inequality Symbols

Fill in the blanks using one of the inequality symbols >, < or = .

1. 4___|-4|
2. -6___|-6|
3. -9___-|-9|
###### Topic Notes
In this lesson, we will learn:
• Evaluate the Absolute Value of a Number
• Evaluate the Absolute Value of an Expression
• Comparing Numbers Using Inequality Symbols

• Absolute value:
• The distance of a number from zero
• Is always non-negative (either zero or positive)
• Absolute value of a number $x$ is expressed as $|x|$ or $abs(x)$
• Absolute value makes a negative number positive. Positive numbers and 0 remain unchanged.