Pre-Algebra · Integers and negative numbers

How to Find Absolute Value

Problem

∣−8∣|-8|

Answer

88

Absolute value is the distance between a number and zero. The direction on the number line does not matter, so the result is never negative.

Step-by-step solution

  1. Read the bars as the distance from zero.

    ∣x∣=distance from 0 on the number line|x| = \text{distance from } 0 \text{ on the number line}

    Why: Absolute value measures how far a number sits from zero, so it is never negative.

  2. Locate -8 on the number line.

    −8 is 8 units to the left of 0-8\ \text{is } 8\ \text{units to the left of } 0

    Why: The sign tells you the direction, not the distance.

  3. Write the distance.

    ∣−8∣=8|-8| = 8

    Why: Distance ignores direction, so the answer is positive.

Common mistakes

  • Writing -8. Absolute value is a distance, and a distance is never negative.
  • Treating the bars like parentheses and keeping the sign inside.
  • Confusing -|-3| with |-3|. The minus sign outside the bars stays in the answer.

Practice problems

Use the same method. Work each problem on paper, then open the answer to check.

  1. ∣−5∣|-5|

    Show answer

    55

  2. ∣7∣|7|

    Show answer

    77

  3. ∣0∣|0|

    Show answer

    00

  4. −∣−3∣-|-3|

    Show answer

    −3-3

  5. ∣−12∣−∣4∣|-12| - |4|

    Show answer

    88