Solutions by everydaycalculation.com
1st number: 1 6/12, 2nd number: 1 8/12
1812 - 2012 is -16.
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Related: 36/12-20/12 18/12-40/12 18/24-20/12 18/12-20/24 54/12-20/12 18/12-60/12 18/36-20/12 18/12-20/36 90/12-20/12 18/60-20/12 18/12-20/60 18/84-20/12 18/12-20/84
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