Includes Adding and Subtracting Angles Presentation - 4.MD.7, and Add and Subtract Angles - 4.MD.7 practice workbook. Add and subtract internal angles to find outer angle measure and missing angles. Complete real-world problems to find missing angles. Scaffolded lesson provides for classroom differentiation. Can be used as a lesson leader, guided practice, independent practice, for cooperative learning and math centers, or as an assessment. Use with smartboard, projector, computer, pad or as pr