Solutions by everydaycalculation.com
1st number: 4 0/3, 2nd number: 8/18
123 + 818 is 409.
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Related: 24/3+8/18 12/3+16/18 12/6+8/18 12/3+8/36 36/3+8/18 12/3+24/18 12/9+8/18 12/3+8/54 60/3+8/18 12/3+40/18 12/15+8/18 12/3+8/90 84/3+8/18 12/3+56/18 12/21+8/18
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