Solutions by everydaycalculation.com
1st number: 4 2/3, 2nd number: 3/21
143 + 321 is 10121.
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Related: 28/3+3/21 14/3+6/21 14/6+3/21 14/3+3/42 42/3+3/21 14/3+9/21 14/9+3/21 14/3+3/63 70/3+3/21 14/3+15/21 14/15+3/21 98/3+3/21 14/21+3/21
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