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