Solutions by everydaycalculation.com
1st number: 3/12, 2nd number: 3 6/12
312 + 4212 is 154.
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Related: 6/12+42/12 3/12+84/12 3/24+42/12 3/12+42/24 9/12+42/12 3/36+42/12 3/12+42/36 15/12+42/12 3/60+42/12 3/12+42/60 21/12+42/12 3/84+42/12 3/12+42/84
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