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3.MD.7.c:
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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Previous Standards Versions
Prekindergarten - Eighth Grade
Grade 3
Measurement and Data
Geometric measurement: understand concepts of area and relate area to multiplication and to addition.
Relate area to the operations of multiplication and addition.
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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