Introduction to absolute value

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.