Solutions by everydaycalculation.com
1st number: 4 0/3, 2nd number: 4/21
123 + 421 is 8821.
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Related: 24/3+4/21 12/3+8/21 12/6+4/21 12/3+4/42 36/3+4/21 12/3+12/21 12/9+4/21 12/3+4/63 60/3+4/21 12/3+20/21 12/15+4/21 84/3+4/21 12/3+28/21 12/21+4/21
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