| Title | Creator | Terms | Created |
|---|---|---|---|
| Adding and Subtracting | Bilbo | 30 | November 26, 2008 |
| Subtracting from 17 & 18 | bpruett | 7 | February 22, 2008 |
| Add and Subtracting Integers | eraguckas | 12 | November 18, 2008 |
| Adding and Subtracting 10, 100, 1,000 | whines | 9 | June 10, 2008 |
| Subtracting from 14 | bpruett | 7 | February 22, 2008 |
| Subtracting from 15 | bpruett | 6 | February 22, 2008 |
| Subtracting from 16 | bpruett | 5 | February 22, 2008 |
| Subtracting 2 | colestevenson | 9 | September 26, 2008 |