Solutions by everydaycalculation.com
1st number: 1 5/10, 2nd number: 3 5/10
1510 - 3510 is -21.
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Related: 30/10-35/10 15/10-70/10 15/20-35/10 15/10-35/20 45/10-35/10 15/30-35/10 15/10-35/30 75/10-35/10 15/50-35/10 15/10-35/50 15/70-35/10 15/10-35/70
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