Solutions by everydaycalculation.com
740 - 640 is 140.
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Related: 14/40-6/40 7/40-12/40 7/80-6/40 7/40-6/80 21/40-6/40 7/40-18/40 35/40-6/40 7/40-30/40 49/40-6/40 7/40-42/40
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