Solutions by everydaycalculation.com
1st number: 1 5/20, 2nd number: 1 15/20
2520 - 3520 is -12.
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Related: 50/20-35/20 25/20-70/20 25/40-35/20 25/20-35/40 75/20-35/20 25/60-35/20 25/20-35/60
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