Solutions by everydaycalculation.com
1st number: 7/10, 2nd number: 1 8/10
710 - 1810 is -1110.
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Related: 14/10-18/10 7/10-36/10 7/20-18/10 7/10-18/20 21/10-18/10 7/10-54/10 7/30-18/10 7/10-18/30 35/10-18/10 7/10-90/10 7/50-18/10 7/10-18/50 49/10-18/10 7/70-18/10 7/10-18/70
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