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ERIC Number: EJ276930
Record Type: CIJE
Publication Date: 1983-Feb
Pages: N/A
Abstractor: N/A
ISBN: N/A
ISSN: N/A
EISSN: N/A
Available Date: N/A
The Non-commutativity of Subtraction.
Mitchell, Charles E.
School Science and Mathematics, v83 n2 p133-39 Feb 1983
It is noted that defining subtraction independently of addition through use of physical objects can help one to illustrate the non-commutativity of this operation. Lack of awareness of the importance of the order of the digits may be a primary cause of errors in compound subtraction. (MP)
Descriptors: Basic Skills, Computation, Elementary Education, Elementary School Mathematics, Instruction, Learning Theories, Mathematics Instruction, Number Concepts, Subtraction, Teaching Methods
Publication Type: Journal Articles; Guides - Classroom - Teacher
Education Level: N/A
Audience: Practitioners
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A
Author Affiliations: N/A