Stage 2 · The Four Operations & Estimation

2.4.3 The Distributive Law

2.4 The Laws of Operations: An Easier Way to Compute

Point 3 of 5

Core idea

Slice one floor into two strips by width, compute each, then join them: a × (b + c) = a × b + a × c.

Module goal. Discover the commutative, associative, and distributive laws, and use them to rearrange expressions and speed up.

eastmath.com · 2.4 The Laws of Operations: An Easier Way to Compute · 2.4.3 The Distributive Law