| Subtract 2-digit numbers: regrouping |
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| 1 |
Subtract 2-digit numbers and 1-digit numbers: no regruping
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| 2 |
Subtract 2-digit numbers: no regrouping |
| 3 | Subtract 2-digit numbers and 1-digit numbers |
| 4 | Subtract 2-digit numbers through 30 |
| 5 | Subtract 2-digit numbers through 60 |
| 6 | Subtract 2-digit numbers through 99 |
| 7 |
Check-up (1) |
| 8 | Subtract three numbers |
| 9 | Word problem: subtract 2-digit numbers (1) |
| 10 | Word problem: subtract 2-digit numbers (2) |
| 11 | Check-up (2) |
| 12 | Check-up (3) |