Solutions by everydaycalculation.com
1st number: 2 2/3, 2nd number: 5/21
83 + 521 is 6121.
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Related: 16/3+5/21 8/3+10/21 8/6+5/21 8/3+5/42 24/3+5/21 8/3+15/21 8/9+5/21 8/3+5/63 40/3+5/21 8/3+25/21 8/15+5/21 56/3+5/21 8/3+35/21 8/21+5/21
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