Absolute Value
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The absolute value of a real number is its distance from zero on the number line, never negative: |−4| = 4 and |4| = 4.
Show
Distance ignores direction: −4 and 4 sit four units from zero on opposite sides, so the bars return 4 for both.
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.