Solutions by everydaycalculation.com
1st number: 3/6, 2nd number: 1 6/12
36 + 1812 is 21.
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Related: 3/6+36/12 3/12+18/12 3/6+18/24 9/6+18/12 3/6+54/12 3/18+18/12 3/6+18/36 15/6+18/12 3/6+90/12 3/30+18/12 3/6+18/60 21/6+18/12 3/42+18/12 3/6+18/84
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