Solutions by everydaycalculation.com
424 - 824 is -16.
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Related: 8/24-8/24 4/24-16/24 4/48-8/24 4/24-8/48 12/24-8/24 4/72-8/24 4/24-8/72 20/24-8/24 4/24-40/24 28/24-8/24 4/24-56/24
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