Solutions by everydaycalculation.com
1st number: 5 1/3, 2nd number: 4/21
163 + 421 is 11621.
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Related: 32/3+4/21 16/3+8/21 16/6+4/21 16/3+4/42 48/3+4/21 16/3+12/21 16/9+4/21 16/3+4/63 80/3+4/21 16/3+20/21 16/15+4/21 16/3+28/21 16/21+4/21
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