Solutions by everydaycalculation.com
1st number: 5/21, 2nd number: 1 9/21
521 + 3021 is 53.
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Related: 10/21+30/21 5/21+60/21 5/42+30/21 5/21+30/42 15/21+30/21 5/21+90/21 5/63+30/21 5/21+30/63 25/21+30/21 35/21+30/21
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