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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 |