Assessment for Changing Numbers - # 11 - 20
Name: _____________________________________________________ Date: __________________________________
Directions: Explain how you changed the first number to get to the second number. Use the cubes and ten frames to help you with your explanation.
| First Number | New Number | How it Changed |
| Ex: 11 | 14 | Added 3 cubes |
| 17 | 12 | |
| 18 | 20 | |
| 12 | 11 | |
| 15 | 18 | |
| 19 | 16 | |
| 13 | 11 | |
| 14 | 18 | |
| 19 | 12 | |
| 20 | 15 | |
| 11 | 20 |