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Peer reviewedSchliemann, Analucia Dias; And Others – Journal of Mathematical Behavior, 1993
A 14-year-old Brazilian boy in the fourth grade was given 170 problems orally, each asking for the sum of 2 2-digit numbers. Responses indicated he had invented his own algorithm for addition, similar to the school one, based largely on his experiences with money. (Contains 13 references.) (JAF)
Descriptors: Addition, Algorithms, Case Studies, Computation
Peer reviewedDuffin, Janet M.; Simpson, Adrian P. – Journal of Mathematical Behavior, 1993
Presents anecdotes, discussion, and definitions of the terms natural, conflicting, and alien as they relate to the teaching and learning of mathematics. (MKR)
Descriptors: Addition, Cognitive Dissonance, College Students, Concept Formation
