| No. |
Title | Add time |
| 1 |  Basic Addition--Add Objects I 1833 | 2007-2-4 15:43:37 |
|
| 2 | Basic Addition--Add Objects II 1129 | 2007-2-5 17:12:03 |
|
| 3 | Basic Addition--Adding Numbers I 977 | 2007-2-5 18:12:23 |
|
| 4 | Basic Addition--Adding Numbers II 918 | 2007-2-5 18:38:30 |
|
| 5 | Basic Addition--Adding Using Words 1199 | 2007-2-5 18:52:02 |
|
| 6 | Addition Facts for 0, 1 and 2 978 | 2007-2-5 21:00:04 |
|
| 7 | Addition Facts for 3 and 4 1015 | 2007-2-5 21:07:11 |
|
| 8 | Addition Facts for 5 and 6 1025 | 2007-2-5 21:14:07 |
|
| 9 | Addition Facts for 7 and 8 936 | 2007-2-5 22:58:57 |
|
| 10 | Addition Facts for 9 and 10 980 | 2007-2-5 23:06:11 |
|
| 11 | Addition Facts for All to 9 + 9 565 | 2007-2-5 23:15:08 |
|
| 12 | Adding Tens 673 | 2006-10-2 20:05:47 |
|
| 13 | Adding Two Digit Numbers Without Renaming 1638 | 2006-10-2 20:08:56 |
|
| 14 | Adding Three One-Digit Numbers 652 | 2006-10-2 20:10:15 |
|
| 15 | Adding Hundreds 1100 | 2006-10-2 20:12:54 |
|
| 16 | Mentally Adding Two-Digit Numbers 1165 | 2006-10-2 20:13:55 |
|
| 17 | Adding Two-Digit Numbers with Paper and Pen... 1002 | 2006-10-2 20:25:19 |
|
| 18 | Estimating a sum by rounding 1236 | 2006-10-4 13:23:49 |
|
| 19 | Front End Estimation of Sums 2701 | 2006-10-4 13:32:06 |
|
| 20 | Add three 2-digit Numbers 1056 | 2006-10-17 16:02:05 |
|
