Solutions by everydaycalculation.com
1st number: 3/20, 2nd number: 4 2/10
320 - 4210 is -8120.
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Related: 6/20-42/10 3/20-84/10 3/40-42/10 3/20-42/20 9/20-42/10 3/60-42/10 3/20-42/30 15/20-42/10 3/20-42/50 21/20-42/10 3/20-42/70
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