Solutions by everydaycalculation.com
1st number: 1 5/10, 2nd number: 2 8/10
1510 - 2810 is -1310.
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Related: 30/10-28/10 15/10-56/10 15/20-28/10 15/10-28/20 45/10-28/10 15/10-84/10 15/30-28/10 15/10-28/30 75/10-28/10 15/50-28/10 15/10-28/50 15/70-28/10 15/10-28/70
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