Solutions by everydaycalculation.com
512 - 112 is 13.
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Related: 10/12-1/12 5/12-2/12 5/24-1/12 5/12-1/24 15/12-1/12 5/12-3/12 5/36-1/12 5/12-1/36 25/12-1/12 5/12-5/12 5/60-1/12 5/12-1/60 35/12-1/12 5/12-7/12 5/84-1/12 5/12-1/84
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