Solutions by everydaycalculation.com
1st number: 1 3/9, 2nd number: 4/12
129 + 412 is 53.
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Related: 24/9+4/12 12/9+8/12 12/18+4/12 12/9+4/24 36/9+4/12 12/27+4/12 12/9+4/36 60/9+4/12 12/9+20/12 12/45+4/12 12/9+4/60 84/9+4/12 12/9+28/12 12/63+4/12 12/9+4/84
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