Solutions by everydaycalculation.com
1st number: 1 8/10, 2nd number: 1 17/18
1810 - 3518 is -1390.
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Related: 36/10-35/18 18/10-70/18 18/20-35/18 18/10-35/36 54/10-35/18 18/30-35/18 18/10-35/54 90/10-35/18 18/50-35/18 18/10-35/90 18/70-35/18
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