Students will learn how to add, subtract, multiply, and divide functions, and determine the domain of the resulting function if it's a rational or radical function. Here's a good video.

Conclude by giving your students these challenges:

- Twin Corresponding Sudoku III by NRICH
- Crescents and Triangles by NRICH
- Round and Round by NRICH
- Triangle Midpoints by NRICH
- A Rectangular Region