Solutions by everydaycalculation.com
1st number: 5/20, 2nd number: 2 10/20
520 - 5020 is -94.
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Related: 10/20-50/20 5/40-50/20 5/20-50/40 15/20-50/20 5/60-50/20 5/20-50/60 25/20-50/20 35/20-50/20
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