Solutions by everydaycalculation.com
112 - 312 is -16.
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Related: 2/12-3/12 1/12-6/12 1/24-3/12 1/12-3/24 3/12-3/12 1/12-9/12 1/36-3/12 1/12-3/36 5/12-3/12 1/12-15/12 1/60-3/12 1/12-3/60 7/12-3/12 1/12-21/12 1/84-3/12 1/12-3/84
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