Solutions by everydaycalculation.com
1st number: 1 6/12, 2nd number: 9/18
1812 + 918 is 21.
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Related: 36/12+9/18 18/24+9/18 18/12+9/36 54/12+9/18 18/12+27/18 18/36+9/18 18/12+9/54 90/12+9/18 18/12+45/18 18/60+9/18 18/12+9/90 18/12+63/18 18/84+9/18
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