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An Investigation of Subtraction Algorithms from the 18th and 19th Centuries

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Visit this site: http://www.maa.org/publications/periodicals/convergence/an-investigation-of-subtraction-algorithms-from-the-18th-and-19th-centuries

Author:Nicole M. Wessman-Enzinger
Description: An exploration of different algorithms used during 18th and 19th century America, with discussion of implications for the modern teacher. This article, which originally appeared in the January 2014 issue of the Mathematical Association of America (MAA) journal Convergence, includes images from printing press textbooks and handwritten "cyphering" books that date back to 1785, and video demonstrations of the equal additions, the decomposition, the complement, and the Austrian methods for figuring the difference between two whole numbers.

Levels: Elementary
Languages: English
Resource Types: Video, Articles
Math Topics: Subtraction, History and Biography

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