What number is missing? 5 + ? = 12, 7, What number is missing? ? + 9 = 15, 6, What number is missing? 14 - ? = 8, 6, What number is missing? ? - 7 = 11, 18, What number is missing? 16 + ? = 25, 9, What number is missing? ? + 13 = 20, 7, What number is missing? 30 - ? = 17, 13, What number is missing? ? - 9 = 14, 23, What number is missing? 7 + ? = 13, 6, What number is missing? ? + 8 = 19, 11, What number is missing? 18 - ? = 10, 8, What number is missing? ? - 6 = 9, 15, What number is missing? 9 + ? = 17, 8, What number is missing? ? + 12 = 18, 6, What number is missing? 25 - ? = 9, 16

Missing Number Problems

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