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

Mental Math Subtraction

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