| Description:
 Simplify problems by grouping numbers together. Adaptive Learning Progression: The number of problems increases. | Start using MathScore for free | 
Sample Levels (out of 5)
| For each problem, check to see if two of the numbers add up to 
10. Then find the total sum. | |
| For each problem, check to see if two of the numbers add up to 
10. Then find the total sum. | 
