MA 03.MD.C.7c Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths. Use area models to represent the distributive property in mathematical reasoning.

Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of a × b and a × c. Use area models to represent the distributive property in mathematical reasoning.

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