Solutions by everydaycalculation.com
1st number: 1 15/20, 2nd number: 16/20
3520 - 1620 is 1920.
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Related: 70/20-16/20 35/20-32/20 35/40-16/20 35/20-16/40 35/20-48/20 35/60-16/20 35/20-16/60 35/20-80/20
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