Solutions by everydaycalculation.com
245 - 645 is -445.
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Related: 4/45-6/45 2/45-12/45 2/90-6/45 2/45-6/90 6/45-6/45 2/45-18/45 10/45-6/45 2/45-30/45 14/45-6/45 2/45-42/45
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