Solutions by everydaycalculation.com
1st number: 9/10, 2nd number: 4 0/10
910 - 4010 is -3110.
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Related: 18/10-40/10 9/10-80/10 9/20-40/10 9/10-40/20 27/10-40/10 9/30-40/10 9/10-40/30 45/10-40/10 9/50-40/10 9/10-40/50 63/10-40/10 9/70-40/10 9/10-40/70
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