Solutions by everydaycalculation.com
1st number: 1 6/10, 2nd number: 3 15/20
1610 - 7520 is -4320.
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Related: 32/10-75/20 16/20-75/20 16/10-75/40 48/10-75/20 16/30-75/20 16/10-75/60 80/10-75/20 16/50-75/20 16/70-75/20
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