Solutions by everydaycalculation.com
1st number: 15/20, 2nd number: 4 10/20
1520 - 9020 is -154.
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Related: 30/20-90/20 15/40-90/20 15/20-90/40 45/20-90/20 15/60-90/20 15/20-90/60 75/20-90/20
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