Solutions by everydaycalculation.com
1st number: 4 2/3, 2nd number: 9/21
143 + 921 is 10721.
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Related: 28/3+9/21 14/3+18/21 14/6+9/21 14/3+9/42 42/3+9/21 14/3+27/21 14/9+9/21 14/3+9/63 70/3+9/21 14/3+45/21 14/15+9/21 98/3+9/21 14/3+63/21 14/21+9/21
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