Solutions by everydaycalculation.com
1st number: 9/10, 2nd number: 4 2/10
910 - 4210 is -3310.
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Related: 18/10-42/10 9/10-84/10 9/20-42/10 9/10-42/20 27/10-42/10 9/30-42/10 9/10-42/30 45/10-42/10 9/50-42/10 9/10-42/50 63/10-42/10 9/70-42/10 9/10-42/70
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