7th Grade · The Number System
Product
7.NS.A.2a
Definition
The result of multiplication. Sign rules: same signs give a positive product; different signs give a negative product.
Examples
- 4 × 3 = 12 and (-4) × (-3) = 12 (same signs, positive).
- 5 × (-3) = -15 (different signs, negative).
Key rule
This sign rule applies to all multiplication — integers, fractions, decimals.
Memory hook
Same signs positive, different signs negative.