Solutions by everydaycalculation.com
1st number: 1 8/10, 2nd number: 5/20
1810 - 520 is 3120.
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Related: 36/10-5/20 18/10-10/20 18/20-5/20 18/10-5/40 54/10-5/20 18/10-15/20 18/30-5/20 18/10-5/60 90/10-5/20 18/10-25/20 18/50-5/20 18/10-35/20 18/70-5/20
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