Solutions by everydaycalculation.com
1st number: 1 15/20, 2nd number: 1 16/20
3520 - 3620 is -120.
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Related: 70/20-36/20 35/20-72/20 35/40-36/20 35/20-36/40 35/60-36/20 35/20-36/60
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