7 + ? = 9, 2, 3, 6, 8, 3 + ? = 7, 1, 4, 6, 8, 13 + ? = 20, 5, 7, 9, 11, ? + 5 = 6, 1, 2, 3, 9, ? + 19 = 20, 1, 4, 5, 7, ? + 8 = 9, 1, 2, 5, 6, 8 + ? = 16, 4, 5, 8, 10, 1 + ? = 4, 3, 6, 7, 9, ? + 1 = 13, 11, 12, 14, 15, ? + 6 = 10, 3, 4, 7, 16, ? + 1 = 1, 0, 1, 2, 6, ? + 3 = 11, 4, 8, 9, 10, 12 + ? = 14, 2, 3, 6, 11, ? + 7 = 16, 5, 9, 10, 15, ? + 12 = 12, 0, 1, 2, 7

Missing Number Addition

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