H Padleckas created this image file in July 2004 for use in the "Arithmetic" chapter of the Wikibooks "Algebra" book, as well as other uses in Wikimedia. H Padleckas 00:43, 9 November 2005 (UTC)
H Padleckas made a slight modification for consistency with other algebra pictures in the middle of February 2006. H Padleckas 09:08, 18 February 2006 (UTC)
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