7th Grade · The Number System
Sign Rules
7.NS.A.2a
Definition
Same signs produce a positive result; different signs produce a negative result. Applies to both multiplication and division of integers.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- 5 × 3 = 15 and (−5) × (−3) = 15 (same signs, positive).
- 5 × (−3) = −15 and (−5) × 3 = −15 (different signs, negative).
Key rule
Same signs to positive, different signs to negative.
Memory hook
Same = positive, different = negative.