Back to matchesWe found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleSome Ideas on Subtraction and Division-Part II.AuthorsO'Brien, Thomas C.PublicationSchool Science & Mathematics, 1967, Vol 67, Issue 7, p650ISSN0036-6803Publication typeArticleDOI10.1111/j.1949-8594.1967.tb15264.x