This worksheet goes along with the Power Point presentation entitled Area of Irregular Shapes , that introduces the common core concept 3.MD.7.
It gives students practice with this difficult concept. You can use it as independent practice or guided practice. It could also be cut apart, laminated, and used as a small intervention group.
Area of Irregular Shapes PPT: http://www.teacherspayteachers.com/Product/Area-of-Irregular-Shapes