Solutions by everydaycalculation.com
712 - 512 is 16.
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Related: 14/12-5/12 7/12-10/12 7/24-5/12 7/12-5/24 21/12-5/12 7/12-15/12 7/36-5/12 7/12-5/36 35/12-5/12 7/12-25/12 7/60-5/12 7/12-5/60 49/12-5/12 7/12-35/12 7/84-5/12 7/12-5/84
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