Solutions by everydaycalculation.com
1st number: 3 0/9, 2nd number: 8/9
279 + 89 is 359.
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Related: 54/9+8/9 27/9+16/9 27/18+8/9 27/9+8/18 81/9+8/9 27/9+24/9 27/9+8/27 27/9+40/9 27/45+8/9 27/9+8/45 27/9+56/9 27/63+8/9 27/9+8/63
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