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Hartnett, Patrice; Gelman, Rochel – Learning and Instruction, 1998
Two studies involving 110 and 91 children aged 5 to 7 years show that children's knowledge of counting and addition facilitated their acquisition of a concept not taught in school, that every number has a natural successor (Successor Principle). Even the oldest children could not rank order correctly numbers that contained fractional notations.…
Descriptors: Addition, Age Differences, Computation, Concept Formation