Addition to 6 (1st grade addition)

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2 + 0
1 + 0
3 + 1
2 + 3
3 + 2
4 + 0
0 + 0
5 + 1
2 + 4
3 + 3
6 + 0
0 + 6
2 + 1
1 + 2
3 + 1
1 + 3