Solutions by everydaycalculation.com
1st number: 5/10, 2nd number: 1 1/5
510 - 65 is -710.
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Related: 5/10-12/5 5/20-6/5 5/10-6/10 15/10-6/5 5/10-18/5 5/30-6/5 5/10-6/15 25/10-6/5 5/10-30/5 5/50-6/5 5/10-6/25 35/10-6/5 5/10-42/5 5/70-6/5 5/10-6/35
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