This animation shows how multiplying a number across a sum, like a(b + c), breaks into two separate products, a*b and a*c, that add to the same total. Rectangles split into smaller area pieces demonstrate why the areas match, connecting arithmetic to geometry. Useful for students learning to expand and factor algebraic expressions, and for teachers introducing the foundation of simplifying expressions before combining like terms.
16:9 · Preview before teaching · automatic layout checks do not establish subject accuracy
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