Solutions by everydaycalculation.com
16 - 615 is -730.
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Related: 2/6-6/15 1/6-12/15 1/12-6/15 1/6-6/30 3/6-6/15 1/6-18/15 1/18-6/15 1/6-6/45 5/6-6/15 1/6-30/15 1/30-6/15 1/6-6/75 7/6-6/15 1/6-42/15 1/42-6/15
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