ERIC Number: EJ276930
Record Type: CIJE
Publication Date: 1983-Feb
Reference Count: 0
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)
Publication Type: Journal Articles; Guides - Classroom - Teacher
Education Level: N/A
Authoring Institution: N/A