Solutions by everydaycalculation.com
1st number: 12/20, 2nd number: 1 15/20
1220 - 3520 is -2320.
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Related: 24/20-35/20 12/20-70/20 12/40-35/20 12/20-35/40 36/20-35/20 12/60-35/20 12/20-35/60 60/20-35/20 84/20-35/20
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