Description:
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
Adaptive Learning Progression: The numbers get bigger (beyond 20) so that you are encouraged to apply the concept rather than do the calculation. |
Start using MathScore for free |
Sample Levels (out of 10)
Solve. | |
Solve. | |
Solve. |