C. Practice the Facts 
- 3 × 3 =
- 8 × 8 =
- 6 × 6 =
- 5 × 5 =
- 10 × 10 =
- 2 × 2 =
- 4 × 4 =
- 7 × 7 =
- 9 × 9 =
- 11 × 11 =
- 12 × 12 =
- 13 × 13 =
- Show or tell how you solved 13 × 13.
- Ana started to use a rectangle model to solve 16 × 16. Finish Ana's strategy to solve the problem.