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Cortina, Jose Luis – Mathematics Education Research Journal, 2013
Results from a project conducted in Mexico are discussed, in which a group of 17 indigenous teachers analyzed the numeration systems of their first language. The main goal of the project is to develop resources that help teachers in supporting students' understanding of the systems. In the first phase of the project, the central organizing ideas…
Descriptors: Foreign Countries, Program Descriptions, Number Concepts, Numbers
Rich, Andrew – College Mathematics Journal, 2008
The leftist number system consists of numbers with decimal digits arranged in strings to the left, instead of to the right. This system fails to be a field only because it contains zerodivisors. The same construction with prime base yields the p-adic numbers.
Descriptors: Number Systems, Mathematics, Number Concepts
Peralta, Javier – International Journal of Mathematical Education in Science and Technology, 2009
The general purpose of this article is to shed some light on the understanding of real numbers, particularly with regard to two issues: the real number as the limit of a sequence of rational numbers and the development of irrational numbers as a continued fraction. By generalizing the expression of the golden ratio in the form of the limit of two…
Descriptors: Numbers, Mathematics, Number Concepts, Number Systems
Cunningham, Clifton – College Mathematics Journal, 2008
An interesting number system is developed in the context of an encounter with alien culture. The resulting system has intriguing parallels and contrasts with our real number system.
Descriptors: Foreign Culture, Number Systems, Mathematics, Number Concepts
Kathota, Vinay – Mathematics Teaching, 2009
"The power of two" is a Royal Institution (Ri) mathematics "master-class". It is a two-and-a half-hour interactive learning session, which, with varying degree of coverage and depth, has been run with students from Year 5 to Year 11, and for teachers. The master class focuses on an historical episode--the Josephus…
Descriptors: Number Systems, Number Concepts, Pattern Recognition, Mathematics Instruction
Suggate, Sebastian, Ed.; Reese, Elaine, Ed. – Routledge, Taylor & Francis Group, 2012
"Contemporary Debates in Childhood Education and Development" is a unique resource and reference work that brings together leading international researchers and thinkers, with divergent points of view, to discuss contemporary problems and questions in childhood education and developmental psychology. Through an innovative format whereby leading…
Descriptors: Early Childhood Education, Child Development, Developmental Psychology, Role of Education
Halberda, Justin; Feigenson, Lisa – Developmental Psychology, 2008
Behavioral, neuropsychological, and brain imaging research points to a dedicated system for processing number that is shared across development and across species. This foundational Approximate Number System (ANS) operates over multiple modalities, forming representations of the number of objects, sounds, or events in a scene. This system is…
Descriptors: Number Systems, Neurology, Child Development, Children
Copley, G. N. – Mathematics Teaching, 1972
The meaning of International Standard Book Numbers (ISBN) and the mathematics involved in the use of a check digit to catch errors in number transcription are discussed. (JM)
Descriptors: Arithmetic, Mathematics, Number Systems
White, Paul – Australian Mathematics Teacher, 2004
Bases such as 5 and 12 provide the same structural place value benefits as base 10. However, when numbers less than one are concerned, base 10 provides friendly decimals for the most common fractions of half, quarter, three-quarters. Base 5 is not user friendly at all in this regard. Base 12 would provide nice dozenimals(?) for the same…
Descriptors: Number Systems, Mathematics, Computation

Burns, Keith H. – Australian Mathematics Teacher, 1973
The method used by Cantor to demonstrate the uncountability of the real numbers is applied to a proof showing that the set of natural numbers is uncountable; the error in the argument is discussed. (DT)
Descriptors: Mathematics, Number Concepts, Number Systems

MacDonald, I. D. – Australian Mathematics Teacher, 1972
Descriptors: Calculus, History, Mathematics, Number Systems

Maier, E. A.; Maier, David – Two-Year College Mathematics Journal, 1973
Descriptors: Algebra, College Mathematics, Mathematics, Number Systems

Trigg, Charles W. – School Science and Mathematics, 1971
Descriptors: Mathematical Concepts, Mathematics, Number Systems, Numbers
Baum, John D. – Mathematical Gazette, 1972
Illustrated is the use of arithmetic modulo 2 for finding the truth values of logical statements. (MM)
Descriptors: Logic, Mathematics, Number Systems, Secondary School Mathematics

Byrkit, Donald R. – School Science and Mathematics, 1971
Descriptors: Mathematics, Number Concepts, Number Systems, Resource Materials