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Peer reviewedBermejo, Vicente; Rodriguez, Purificacion – Learning and Instruction, 1993
Comprehension and development of the commutative law of addition by children were studied through commutative tasks completed by 72 children aged 5 to 8 years in Madrid (Spain). Results show that children focus mainly on addends in judging equivalence of commuted pairs. A five-level model of understanding of commutativity is proposed. (SLD)
Descriptors: Addition, Children, Comprehension, Elementary Education
Peer reviewedMatthews, Julia – Mathematics in School, 1980
This is a preliminary report on research into computational errors made by six- and seven-year-olds. (Author/MK)
Descriptors: Addition, Comprehension, Computation, Educational Assessment
