Solutions by everydaycalculation.com
1st number: 4 0/3, 2nd number: 10/21
123 + 1021 is 9421.
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Related: 24/3+10/21 12/3+20/21 12/6+10/21 12/3+10/42 36/3+10/21 12/3+30/21 12/9+10/21 12/3+10/63 60/3+10/21 12/3+50/21 12/15+10/21 84/3+10/21 12/3+70/21 12/21+10/21
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