Solutions by everydaycalculation.com
1st number: 4 0/3, 2nd number: 20/21
123 + 2021 is 10421.
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Related: 24/3+20/21 12/3+40/21 12/6+20/21 12/3+20/42 36/3+20/21 12/3+60/21 12/9+20/21 12/3+20/63 60/3+20/21 12/15+20/21 84/3+20/21 12/21+20/21
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