Solutions by everydaycalculation.com
1st number: 1 2/10, 2nd number: 10/40
1210 - 1040 is 1920.
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Related: 24/10-10/40 12/10-20/40 12/20-10/40 12/10-10/80 36/10-10/40 12/10-30/40 12/30-10/40 60/10-10/40 12/10-50/40 12/50-10/40 84/10-10/40 12/10-70/40 12/70-10/40
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