Solutions by everydaycalculation.com
1st number: 5/10, 2nd number: 3 5/10
510 - 3510 is -31.
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Related: 5/10-70/10 5/20-35/10 5/10-35/20 15/10-35/10 5/30-35/10 5/10-35/30 25/10-35/10 5/50-35/10 5/10-35/50 35/10-35/10 5/70-35/10 5/10-35/70
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