Solutions by everydaycalculation.com
68 - 18 is 58.
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Related: 12/8-1/8 6/8-2/8 6/16-1/8 6/8-1/16 18/8-1/8 6/8-3/8 6/24-1/8 6/8-1/24 30/8-1/8 6/8-5/8 6/40-1/8 6/8-1/40 42/8-1/8 6/8-7/8 6/56-1/8 6/8-1/56
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