7th Grade · Expressions & Equations
Distributive Property
7.EE.A.1
Definition
a(b + c) = ab + ac. Multiply the factor outside the parentheses by each term inside. Works with addition and subtraction.
Teach it
Where it is taught, with guided notes, practice, homework, an exit ticket and an interactive Teacher Deck.
Examples
- 3(x + 5) = 3·x + 3·5 = 3x + 15.
- −2(4x − 3) = −2(4x) + (−2)(−3) = −8x + 6.
Key rule
Also works in reverse — that is called factoring.
Memory hook
Hand out the outside number to everyone inside.