Solutions by everydaycalculation.com
1st number: 5/10, 2nd number: 4 9/10
510 - 4910 is -225.
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Related: 5/10-98/10 5/20-49/10 5/10-49/20 15/10-49/10 5/30-49/10 5/10-49/30 25/10-49/10 5/50-49/10 5/10-49/50 35/10-49/10 5/70-49/10 5/10-49/70
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