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