Solutions by everydaycalculation.com
1st number: 1 15/20, 2nd number: 4/5
3520 - 45 is 1920.
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Related: 70/20-4/5 35/20-8/5 35/40-4/5 35/20-4/10 35/20-12/5 35/60-4/5 35/20-4/15 35/20-20/5 35/20-4/25 35/20-28/5 35/20-4/35
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