Solutions by everydaycalculation.com
1st number: 1 2/10, 2nd number: 1 6/12
1210 - 1812 is -310.
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Related: 24/10-18/12 12/10-36/12 12/20-18/12 12/10-18/24 36/10-18/12 12/10-54/12 12/30-18/12 12/10-18/36 60/10-18/12 12/10-90/12 12/50-18/12 12/10-18/60 84/10-18/12 12/70-18/12 12/10-18/84
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