Solutions by everydaycalculation.com
1st number: 1 15/20, 2nd number: 2 2/20
3520 - 4220 is -720.
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Related: 70/20-42/20 35/20-84/20 35/40-42/20 35/20-42/40 35/60-42/20 35/20-42/60
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