Solutions by everydaycalculation.com
1st number: 1 8/10, 2nd number: 2 8/10
1810 - 2810 is -11.
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Related: 36/10-28/10 18/10-56/10 18/20-28/10 18/10-28/20 54/10-28/10 18/10-84/10 18/30-28/10 18/10-28/30 90/10-28/10 18/50-28/10 18/10-28/50 18/70-28/10 18/10-28/70
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