Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 1 15/20
310 - 3520 is -2920.
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Related: 6/10-35/20 3/10-70/20 3/20-35/20 3/10-35/40 9/10-35/20 3/30-35/20 3/10-35/60 15/10-35/20 3/50-35/20 21/10-35/20 3/70-35/20
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