Solutions by everydaycalculation.com
1st number: 1 15/20, 2nd number: 2 5/20
3520 - 4520 is -12.
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Related: 70/20-45/20 35/20-90/20 35/40-45/20 35/20-45/40 35/60-45/20 35/20-45/60
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