Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 1 10/30
310 - 4030 is -3130.
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Related: 6/10-40/30 3/10-80/30 3/20-40/30 3/10-40/60 9/10-40/30 3/30-40/30 3/10-40/90 15/10-40/30 3/50-40/30 21/10-40/30 3/70-40/30
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