# 9. Add and Subtract Angles

**Add and Subtract Angles Worksheet** addresses the concept of decomposing angles into two or more smaller angles. An angle can be visualized as made up of two or more non-overlapping parts (smaller angles). With this understanding, students add or subtract two given angles in this worksheet.

### Common Core Alignment

**4.MD.7**Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems, e.g., by using an equation with a symbol for the unknown angle measure.