Solutions by everydaycalculation.com
1518 - 918 is 13.
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Related: 30/18-9/18 15/36-9/18 15/18-9/36 45/18-9/18 15/18-27/18 15/54-9/18 15/18-9/54 75/18-9/18 15/18-45/18 15/90-9/18 15/18-9/90 15/18-63/18
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