Solutions by everydaycalculation.com
1st number: 12/18, 2nd number: 2 6/18
1218 + 4218 is 31.
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Related: 24/18+42/18 12/18+84/18 12/36+42/18 12/18+42/36 36/18+42/18 12/54+42/18 12/18+42/54 60/18+42/18 12/90+42/18 12/18+42/90 84/18+42/18
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