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Peer reviewedPollak, Henry – Australian Mathematics Teacher, 1989
Possible ways of mechanization for counting using a binary system are discussed. Shows a binary representation of the numbers and geometric models having eight triples of lamps. Provides three problem sets. (YP)
Descriptors: Algorithms, Computation, Geometric Constructions, Geometry
Peer reviewedSowder, Judith T.; Wheeler, Margariete M. – Journal for Research in Mathematics Education, 1989
Investigates the development of concepts and processes associated with computational estimation. Twelve students at each of grades three, five, seven, and nine were interviewed. The older children understood better than the younger children what was asked but were uncomfortable with estimation processes and outcomes. (Author/YP)
Descriptors: Computation, Concept Formation, Elementary School Mathematics, Estimation (Mathematics)
