Solutions by everydaycalculation.com
1st number: 1 6/10, 2nd number: 4 2/10
1610 - 4210 is -135.
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Related: 32/10-42/10 16/10-84/10 16/20-42/10 16/10-42/20 48/10-42/10 16/30-42/10 16/10-42/30 80/10-42/10 16/50-42/10 16/10-42/50 16/70-42/10 16/10-42/70
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