Solutions by everydaycalculation.com
1st number: 9/10, 2nd number: 1 8/10
910 - 1810 is -910.
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Related: 18/10-18/10 9/10-36/10 9/20-18/10 9/10-18/20 27/10-18/10 9/10-54/10 9/30-18/10 9/10-18/30 45/10-18/10 9/10-90/10 9/50-18/10 9/10-18/50 63/10-18/10 9/70-18/10 9/10-18/70
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