3rd grade area & volume worksheets

A real sample sheet.

Three area & volume skills at 3rd grade, one sheet each, free with its answer key: area & perimeter, rectilinear area, and area by counting unit squares.

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  • Area & perimeter Area is the space inside a shape. Perimeter is the distance around the outside. For rectangles, area = length × width and perimeter = 2 × (length + width).
  • Rectilinear area Split the shape into two rectangles and add their areas, or find the big rectangle and take the notch off.
  • Area by counting unit squares Count the unit squares to find each area. Include square units.

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