Solutions by everydaycalculation.com
1st number: 5 4/12, 2nd number: 1 9/12
6412 + 2112 is 8512.
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Related: 64/12+42/12 64/24+21/12 64/12+21/24 64/12+63/12 64/36+21/12 64/12+21/36 64/60+21/12 64/12+21/60 64/84+21/12 64/12+21/84
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