Solutions by everydaycalculation.com
1st number: 1 12/18, 2nd number: 1 17/18
3018 - 3518 is -518.
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Related: 60/18-35/18 30/18-70/18 30/36-35/18 30/18-35/36 90/18-35/18 30/54-35/18 30/18-35/54 30/90-35/18 30/18-35/90
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