Solutions by everydaycalculation.com
1st number: 2 11/12, 2nd number: 3 6/12
3512 - 4212 is -712.
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Related: 70/12-42/12 35/12-84/12 35/24-42/12 35/12-42/24 35/36-42/12 35/12-42/36 35/60-42/12 35/12-42/60 35/84-42/12 35/12-42/84
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