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      CCSS.Math.Content.3.MD.C
      Geometric measurement: understand concepts of area and relate area to multiplication and to addition.
      Measurement and Data
      Common Core State Standards (CCSS) Initiative: Mathematics Standards

      CCSS.Math.Content.3.MD.C.5 Recognize area as an attribute of plane figures and understand concepts of area measurement.

      • CCSS.Math.Content.3.MD.C.5a
        A square with side length 1 unit, called "a unit square," is said to have "one square unit" of area, and can be used to measure area.
      • CCSS.Math.Content.3.MD.C.5b
        A plane figure which can be covered without gaps or overlaps by n unit squares is said to have an area of n square units.
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