Solutions by everydaycalculation.com
1st number: 1 15/20, 2nd number: 2 9/20
3520 - 4920 is -710.
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Related: 70/20-49/20 35/20-98/20 35/40-49/20 35/20-49/40 35/60-49/20 35/20-49/60
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