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Doubles
| Problem | answer |
|---|---|
| 2+2 | 4 |
| 3+3 | 6 |
| 5+5 | 10 |
| 4+4 | 8 |
| 7+7 | 14 |
| 8+8 | 16 |
| 9+9 | 18 |
| 6+6 | 12 |
| 1+1 | 2 |
| 10 + 10 | 20 |
| 11 + 11 | (blank) |
| 12 + 12 | (blank) |
| 13 + 13 | (blank) |
| 14 + 14 | (blank) |
| 15 + 15 | (blank) |
| 10 + 10 | 20 |
| 11 + 11 | 22 |
| 12 + 12 | 24 |
| 13 + 13 | 26 |
| 14 + 14 | 28 |
| 15 + 15 | 30 |