Solutions by everydaycalculation.com
728 - 628 is 128.
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Related: 14/28-6/28 7/28-12/28 7/56-6/28 7/28-6/56 21/28-6/28 7/28-18/28 7/84-6/28 7/28-6/84 35/28-6/28 7/28-30/28 49/28-6/28 7/28-42/28
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