Solutions by everydaycalculation.com
1st number: 4 0/3, 2nd number: 8/12
123 + 812 is 143.
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Related: 24/3+8/12 12/3+16/12 12/6+8/12 12/3+8/24 36/3+8/12 12/3+24/12 12/9+8/12 12/3+8/36 60/3+8/12 12/3+40/12 12/15+8/12 12/3+8/60 84/3+8/12 12/3+56/12 12/21+8/12 12/3+8/84
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