7th Grade · The Number System
Fact Family
7.NS.A.2b
Definition
A set of related multiplication and division sentences using the same three numbers. The product sits at the apex; the two factors sit at the base.
Examples
- 3, 4, 12 → 3×4=12, 4×3=12, 12÷3=4, 12÷4=3.
- 5, 6, 30 → 5×6=30, 6×5=30, 30÷5=6, 30÷6=5.
Key rule
Four facts, same three numbers — product on top, factors on the bottom.
Memory hook
Same three numbers, four facts.