Solutions by everydaycalculation.com
1st number: 4 0/3, 2nd number: 3/12
123 + 312 is 174.
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Related: 24/3+3/12 12/3+6/12 12/6+3/12 12/3+3/24 36/3+3/12 12/3+9/12 12/9+3/12 12/3+3/36 60/3+3/12 12/3+15/12 12/15+3/12 12/3+3/60 84/3+3/12 12/3+21/12 12/21+3/12 12/3+3/84
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