Solutions by everydaycalculation.com
1st number: 6/20, 2nd number: 1 15/20
620 - 3520 is -2920.
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Related: 12/20-35/20 6/20-70/20 6/40-35/20 6/20-35/40 18/20-35/20 6/60-35/20 6/20-35/60 30/20-35/20 42/20-35/20
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