Solutions by everydaycalculation.com
1st number: 1 5/10, 2nd number: 1 5/10
1510 + 1510 is 31.
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Related: 30/10+15/10 15/10+30/10 15/20+15/10 15/10+15/20 45/10+15/10 15/10+45/10 15/30+15/10 15/10+15/30 75/10+15/10 15/10+75/10 15/50+15/10 15/10+15/50 15/70+15/10 15/10+15/70
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