Solutions by everydaycalculation.com
1st number: 7 7/8, 2nd number: 3 3/8
638 + 278 is 454.
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Related: 63/8+54/8 63/16+27/8 63/8+27/16 63/8+81/8 63/24+27/8 63/8+27/24 63/40+27/8 63/8+27/40 63/56+27/8 63/8+27/56
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