This Application Problem is a part of the Lesson 11, Unit 3, Grade 4. Write an equation for the area of each rectangle. Then, find the sum of the two areas. Find a faster method for finding the area of the combined rectangles. Scaffold student use of the area model to solve with the following options: Provide a blank area model template for students to slip into their personal white boards. Review expanded form with place value cards or place value disks.