Solutions by everydaycalculation.com
1st number: 1 6/15, 2nd number: 6/10
2115 + 610 is 21.
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Related: 42/15+6/10 21/15+12/10 21/30+6/10 21/15+6/20 63/15+6/10 21/15+18/10 21/45+6/10 21/15+6/30 21/15+30/10 21/75+6/10 21/15+6/50 21/15+42/10 21/15+6/70
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