10 + 2 =, 12, 2 + 1 =, 3, 10 + 3 =, 13, 4 + 10 =, 14, 4 + 2 =, 6, 6 + 10 =, 16, 3 + 3 =, 6, 10 + 6 =, 16, 12 + 1 =, 13, 2 + 2 =, 4, 12 + 2 =, 14, 4 + 4 =, 8, 13 + 3 =, 16, 12 + 3 =, 15, 14 + 3 =, 17, 13 + 5 =, 18, 15 + 5 =, 20, 5 + 4 =, 9, 2 + 8 =, 10, 4 + 14 =, 18, 4 + 15 =, 19
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Addition
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