Solutions by everydaycalculation.com
828 - 928 is -128.
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Related: 16/28-9/28 8/28-18/28 8/56-9/28 8/28-9/56 24/28-9/28 8/28-27/28 8/84-9/28 8/28-9/84 40/28-9/28 8/28-45/28 56/28-9/28 8/28-63/28
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