Solutions by everydaycalculation.com
1st number: 1 8/10, 2nd number: 3/15
1810 + 315 is 21.
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Related: 36/10+3/15 18/10+6/15 18/20+3/15 18/10+3/30 54/10+3/15 18/10+9/15 18/30+3/15 18/10+3/45 90/10+3/15 18/50+3/15 18/10+3/75 18/10+21/15 18/70+3/15
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