Solutions by everydaycalculation.com
1st number: 1 1/20, 2nd number: 4 2/10
2120 - 4210 is -6320.
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Related: 42/20-42/10 21/20-84/10 21/40-42/10 21/20-42/20 63/20-42/10 21/60-42/10 21/20-42/30 21/20-42/50 21/20-42/70
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