Solutions by everydaycalculation.com
1st number: 1 4/20, 2nd number: 1 5/20
2420 - 2520 is -120.
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Related: 48/20-25/20 24/20-50/20 24/40-25/20 24/20-25/40 72/20-25/20 24/20-75/20 24/60-25/20 24/20-25/60
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