Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 4 0/10
310 - 4010 is -3710.
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Related: 6/10-40/10 3/10-80/10 3/20-40/10 3/10-40/20 9/10-40/10 3/30-40/10 3/10-40/30 15/10-40/10 3/50-40/10 3/10-40/50 21/10-40/10 3/70-40/10 3/10-40/70
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