| No. |
Title | Add time |
| 1 |  Basic Addition--Add Objects I 6022 | 2007-02-04 15:43:37 |
|
| 2 | Basic Addition--Add Objects II 4403 | 2007-02-05 17:12:03 |
|
| 3 | Basic Addition--Adding Numbers I 4205 | 2007-02-05 18:12:23 |
|
| 4 | Basic Addition--Adding Numbers II 4007 | 2007-02-05 18:38:30 |
|
| 5 | Basic Addition--Adding Using Words 4442 | 2007-02-05 18:52:02 |
|
| 6 | Addition Facts for 0, 1 and 2 4071 | 2007-02-05 21:00:04 |
|
| 7 | Addition Facts for 3 and 4 4128 | 2007-02-05 21:07:11 |
|
| 8 | Addition Facts for 5 and 6 4123 | 2007-02-05 21:14:07 |
|
| 9 | Addition Facts for 7 and 8 4106 | 2007-02-05 22:58:57 |
|
| 10 | Addition Facts for 9 and 10 4192 | 2007-02-05 23:06:11 |
|
| 11 | Addition Facts for All to 9 + 9 2969 | 2007-02-05 23:15:08 |
|
| 12 | Adding Tens 3161 | 2006-10-02 20:05:47 |
|
| 13 | Adding Three One-Digit Numbers 3253 | 2006-10-02 20:10:15 |
|
| 14 | One Digit Addition Equations 2188 | 2006-11-19 13:11:21 |
|
| 15 | Subtract Objects I 2782 | 2006-11-28 19:06:12 |
|
| 16 | Subtract Objects II 2933 | 2006-11-28 19:15:29 |
|
| 17 | Subtracting Numbers I 2950 | 2006-11-30 18:23:24 |
|
| 18 | Subtracting Numbers II 2773 | 2006-11-30 18:24:12 |
|
| 19 | Subtracting Using Words 2823 | 2006-12-06 18:33:38 |
|
| 20 | Subtraction Facts 0, 1 and 2 2919 | 2006-12-06 18:37:04 |
|
