Solutions by everydaycalculation.com
1st number: 2 1/10, 2nd number: 4 2/10
2110 - 4210 is -2110.
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Related: 42/10-42/10 21/10-84/10 21/20-42/10 21/10-42/20 63/10-42/10 21/30-42/10 21/10-42/30 21/50-42/10 21/10-42/50 21/70-42/10 21/10-42/70
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