Correct, 7 - 7 =, 18 - 18 =, 2 - 2 =, 3 - 3 =, 4 - 4 =, 5 - 5 =, 6 - 6 =, 8 - 8 =, 9 - 9 =, 10 - 10 =, 99 - 99 =, 124 - 124 =, Incorrect, 7 - 3 =, 5 - 2 =, 6 - 4 =, 10 - 6 =, 9 - 4 =, 8 - 3 =, 10 - 5 =, 4 - 3 =, 7 - 5 =, 3 - 1 =, 8 - 5 =, 7 - 1 =

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