NUM010 · Numbers & number systems · Classes 6–8
Opposites
Two numbers are opposites when they are the same distance from 0 on opposite sides. A number and its opposite add to zero.
3 ↔ −3Opposites
📐 Formula
opposite of x is −x; x + (−x) = 0
✏️ Worked example
The opposite of 3 is −3, and 3 + (−3) = 0.
🌍 Where it is used
Deposits and withdrawals, going up and down stairs, gains and losses.
❓ Quick check
What is the opposite of −8?
🏋️ Practice
EasyOpposite of 15?
Answer: −15
MediumWhat is −(−6)?
Answer: 6
ChallengeA number plus its opposite is…?
Answer: 0