Use tiling to show in a concrete case that the area of a rectangle with whole-number side length π’ and side length π£ + π€ is the sum of π’ Γ π£ and π’ Γ π€. Use area models to represent the distributive property in mathematical reasoning.

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.