Absolute Value
vs. Order
Learn the difference between how far a number is from zero and where it sits on the number line.
What is Order on a Number Line?
Order tells us which number is greater or lesser. On a number line, numbers increase as you move to the right and decrease as you move to the left. So \( -3 < 2 \) because \( -3 \) is to the left of \( 2 \).
What is Absolute Value?
Absolute value tells us how far a number is from zero, ignoring direction. We write it with bars: \( |{-3}| = 3 \) and \( |3| = 3 \). Both are 3 units from zero.
Why Does This Distinction Matter?
In everyday life, we use both ideas without thinking about it. Imagine two people standing on opposite sides of a building:
The Core Rule
Smaller Number, Bigger Distance?
A negative number can be less than a positive number but farther from zero. The key insight:
Two Different Questions
| Order (Position) | Absolute Value (Distance) | |
|---|---|---|
| Question | Which is greater or lesser? | Which is farther from zero? |
| Symbol | \( < \), \( > \), \( = \) | \( | \; | \) |
| Direction | Matters (left vs right) | Ignored (only distance) |
| Result | Can be negative | Always \( \geq 0 \) |
| Example | \( -6 \) \( < \) \( 1 \) | \( |{-6}| \) \( = 6 > \) \( |1| \) \( = 1 \) |
How to Apply This Skill
Example 1: Interpreting a Statement
Example 2: Comparing Debts
Maya owes $8 (account balance: \( -8 \)). Leo owes $3 (account balance: \( -3 \)). Who has the lower balance? Who owes more?
Example 3: Temperature Comparison
City A: \( -12^\circ\text{F} \). City B: \( 5^\circ\text{F} \). Which city is colder? Which temperature is farther from \( 0^\circ\text{F} \)?
Example 4: Two Negatives
Compare \( -2 \) and \( -9 \). Which is greater? Which has the greater absolute value?
Reading Carefully
In word problems and test questions, certain phrases signal whether you need order or absolute value:
Common Mistakes
Summary Table
| Numbers | Order Comparison | Absolute Value Comparison |
|---|---|---|
| \( -5 \) and \( 3 \) | \( -5 < 3 \) | \( |{-5}| = 5 > |3| = 3 \) |
| \( -2 \) and \( 8 \) | \( -2 < 8 \) | \( |{-2}| = 2 < |8| = 8 \) |
| \( -7 \) and \( -1 \) | \( -7 < -1 \) | \( |{-7}| = 7 > |{-1}| = 1 \) |
| \( 4 \) and \( -4 \) | \( -4 < 4 \) | \( |{-4}| = 4 = |4| = 4 \) |
| \( -3 \) and \( -9 \) | \( -9 < -3 \) | \( |{-9}| = 9 > |{-3}| = 3 \) |
Question 1 of 5
Which statement correctly describes the relationship between \( -6 \) and \( 2 \)?
Question 2 of 5
Sam says: "Since \( |{-3}| < |{-8}| \), we know that \( -3 < -8 \)."
Is Sam correct?
Question 3 of 5
The temperature on Monday was \( -15^\circ\text{F} \) and on Tuesday it was \( 10^\circ\text{F} \). Which day had the temperature farther from \( 0^\circ\text{F} \)?
Question 4 of 5
Jenna owes \( \$12 \) (balance: \( -12 \)). Kyle has \( \$5 \) (balance: \( +5 \)). Which statement about absolute value is correct?
Question 5 of 5
For which pair of numbers is the greater number also farther from zero?