Solutions by everydaycalculation.com
1st number: 1 6/12, 2nd number: 8/9
1812 + 89 is 4318.
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Related: 36/12+8/9 18/12+16/9 18/24+8/9 18/12+8/18 54/12+8/9 18/12+24/9 18/36+8/9 18/12+8/27 90/12+8/9 18/12+40/9 18/60+8/9 18/12+8/45 18/12+56/9 18/84+8/9 18/12+8/63
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