CCSS 3.MD.5B (Common Core, 3rd Grade): "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." The worksheets below practice this standard. Each one is a free printable PDF with an answer key, comes in multiple versions, and can also be assigned digitally - no login or account needed.
Measurement and Data Geometric measurement: understand concepts of area and relate area to multiplication and to addition.5Recognize area as an attribute of plane figures and understand concepts of area measurement.bA plane figure which can be covered without gaps or overlaps by n unit squares is said to have an area of n square units.