AR016 · Arithmetic operations · Classes 7–9
Signed division
Division follows the same sign rules as multiplication. Check a division by multiplying back. Division by zero is not defined.
−12 ÷ 3Signed division
📐 Formula
(−a) ÷ b = −(a ÷ b); (−a) ÷ (−b) = a ÷ b; b ≠ 0
✏️ Worked example
(−12) ÷ 3 = −4, because (−4) × 3 = −12.
🌍 Where it is used
Average change per day, such as a temperature drop.
❓ Quick check
(−18) ÷ (−6) = ?
🏋️ Practice
Easy20 ÷ (−5) = ?
Answer: −4
Medium(−36) ÷ (−9) = ?
Answer: 4
ChallengeTemperature fell 15 °C in 5 hours. Change per hour?
Answer: −3 °C