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  • 3rd Grade
  • Math
  • About 10 minutes

Break Apart to Find Area

Split the shape at the dashed line into two rectangles. Find each area, then add.

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Break Apart to Find AreaName:Date:Split the shape at the dashed line into two rectangles. Find each area, then add.ABA:×=B:×=Area:+=sq unitsABA:×=B:×=Area:+=sq unitsABA:×=B:×=Area:+=sq unitsABA:×=B:×=Area:+=sq unitsk5printables.com · Sheet #75824601 · Aligned with Common Core 3.MD.C.7

This is sheet #75824601.

How to do it

  1. Find the area of rectangle A.
  2. Find the area of rectangle B.
  3. Add the two areas.

Teaching tip

Color the two parts in different colors to see them clearly. This sheet is aligned with Common Core 3.MD.C.7.

Break Apart to Find Area worksheet for 3rd grade (area and perimeter), free printable
Printable preview

About this worksheet

L-shaped figures split into two rectangles. Find each area, then add.

What kids practice

Area is the amount of space inside a flat shape, measured in square units. Perimeter is the distance all the way around a shape, measured in units of length. Third graders find area by counting squares and then by multiplying length × width. They find perimeter by adding the side lengths, and learn that two shapes can have the same area but different perimeters.

Watch for

  • Mixing up area and perimeter. Area is inside; perimeter is around.
  • Adding only the two labeled sides of a rectangle instead of all four.
  • Writing area in plain units instead of square units.

It's free to print, with Fewer, Standard or More on the page and an answer key. See the full area and perimeter guide for 3rd grade.

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