Solutions by everydaycalculation.com
1st number: 1 6/18, 2nd number: 1 12/18
2418 - 3018 is -13.
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Related: 48/18-30/18 24/18-60/18 24/36-30/18 24/18-30/36 72/18-30/18 24/18-90/18 24/54-30/18 24/18-30/54 24/90-30/18 24/18-30/90
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