Solutions by everydaycalculation.com
1st number: 10/20, 2nd number: 2 5/20
1020 - 4520 is -74.
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Related: 10/20-90/20 10/40-45/20 10/20-45/40 30/20-45/20 10/60-45/20 10/20-45/60 50/20-45/20 70/20-45/20
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