Solutions by everydaycalculation.com
1st number: 3/10, 2nd number: 1 2/10
310 - 1210 is -910.
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Related: 6/10-12/10 3/10-24/10 3/20-12/10 3/10-12/20 9/10-12/10 3/10-36/10 3/30-12/10 3/10-12/30 15/10-12/10 3/10-60/10 3/50-12/10 3/10-12/50 21/10-12/10 3/10-84/10 3/70-12/10 3/10-12/70
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