2 + ? = 2, 0, 1, 6, 7, 8 + ? = 10, 2, 3, 4, 6, 12 + ? = 13, 1, 2, 7, 11, 4 + ? = 5, 1, 3, 6, 14, ? + 5 = 17, 4, 12, 13, 16, 1 + ? = 7, 6, 8, 9, 13, ? + 3 = 5, 2, 3, 4, 8, 7 + ? = 16, 5, 7, 9, 10, ? + 18 = 20, 2, 3, 9, 10, ? + 17 = 17, 0, 3, 4, 5, ? + 2 = 11, 6, 9, 12, 13, 3 + ? = 11, 7, 8, 10, 14, 2 + ? = 13, 7, 9, 11, 12, 10 + ? = 15, 4, 5, 8, 10, ? + 2 = 17, 12, 14, 15, 16

Addition

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