Solutions by everydaycalculation.com
18 - 16 is -124.
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Related: 2/8-1/6 1/8-2/6 1/16-1/6 1/8-1/12 3/8-1/6 1/8-3/6 1/24-1/6 1/8-1/18 5/8-1/6 1/8-5/6 1/40-1/6 1/8-1/30 7/8-1/6 1/8-7/6 1/56-1/6 1/8-1/42
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