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Lemaire, Patrick; Lecacheur, Mireille – Cognitive Development, 2011
Third, fifth, and seventh graders selected the best strategy (rounding up or rounding down) for estimating answers to two-digit addition problems. Executive function measures were collected for each individual. Data showed that (a) children's skill at both strategy selection and execution improved with age and (b) increased efficiency in executive…
Descriptors: Grade 3, Grade 5, Grade 7, Age Differences
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Robinson, Katherine M.; Dube, Adam K. – Cognitive Development, 2009
Children's understanding of the inversion concept in multiplication and division problems (i.e., that on problems of the form "d multiplied by e/e" no calculations are required) was investigated. Children in Grades 6, 7, and 8 completed an inversion problem-solving task, an assessment of procedures task, and a factual knowledge task of simple…
Descriptors: Problem Solving, Knowledge Level, Early Adolescents, Preadolescents