Family practice
Area counts a region once, and a hole not at all.
Optional until a teacher marks it
A 12 by 8 rectangle has a 5 by 3 rectangle removed.
The area of a composite figure is the sum of parts that cover it exactly once. A hole or a cut-out is not added. A different cut of the same figure has the same area.
Problem 1 of 8. What we learned, an example, a few together, then independent practice.