6 - ? = 5, 1, 2, 3, 9, 5 - ? = 4, 1, 3, 10, 11, ? - 2 = 14, 8, 15, 16, 17, ? - 18 = 2, 12, 14, 19, 20, ? - 7 = 2, 9, 4, 6, 8, 16 - ? = 13, 2, 3, 5, 6, 18 - ? = 6, 12, 13, 14, 16, ? - 7 = 13, 13, 14, 19, 20, 15 - ? = 2, 12, 13, 14, 16, 20 - ? = 4, 12, 16, 17, 19, ? - 4 = 4, 5, 8, 11, 13, 20 - ? = 2, 7, 10, 17, 18, ? - 1 = 0, 1, 6, 7, 8, ? - 5 = 5, 4, 6, 10, 11, ? - 5 = 4, 9, 10, 11, 16.
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Missing Addends
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