Solutions by everydaycalculation.com
1st number: 1 8/10, 2nd number: 3/20
1810 - 320 is 3320.
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Related: 36/10-3/20 18/10-6/20 18/20-3/20 18/10-3/40 54/10-3/20 18/10-9/20 18/30-3/20 18/10-3/60 90/10-3/20 18/10-15/20 18/50-3/20 18/10-21/20 18/70-3/20
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