Solutions by everydaycalculation.com
112 - 612 is -512.
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Related: 2/12-6/12 1/24-6/12 1/12-6/24 3/12-6/12 1/12-18/12 1/36-6/12 1/12-6/36 5/12-6/12 1/12-30/12 1/60-6/12 1/12-6/60 7/12-6/12 1/12-42/12 1/84-6/12 1/12-6/84
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