Solutions by everydaycalculation.com
112 - 812 is -712.
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Related: 2/12-8/12 1/12-16/12 1/24-8/12 1/12-8/24 3/12-8/12 1/12-24/12 1/36-8/12 1/12-8/36 5/12-8/12 1/12-40/12 1/60-8/12 1/12-8/60 7/12-8/12 1/12-56/12 1/84-8/12 1/12-8/84
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