Solutions by everydaycalculation.com
1st number: 1 6/12, 2nd number: 2 6/12
1812 - 3012 is -11.
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Related: 36/12-30/12 18/12-60/12 18/24-30/12 18/12-30/24 54/12-30/12 18/12-90/12 18/36-30/12 18/12-30/36 90/12-30/12 18/60-30/12 18/12-30/60 18/84-30/12 18/12-30/84
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