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6 février 2019
- handle: 10670/1.8avab1
- hal: hal-02401039
info:eu-repo/semantics/OpenAccess
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Ioannis Papadopoulos et al., « Mental calculations with rational numbers across educational levels », HAL-SHS : sciences de l'éducation, ID : 10670/1.8avab1
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In this study primary, secondary and tertiary education students try to calculate mentally the very same tasks involving operations with rational numbers (mainly fractions and mixed numbers). The aim was to record the range of strategies used by the students and at the same time to examine how these strategies are distributed across these three educational levels. The findings give evidence that no matter the educational level, the dominant strategy is the use of mental form of the written algorithm. All the other strategies are underrepresented. Moreover, it seems that the use of rational numbers in mental calculation is in itself an obstacle for the students since a great percentage of them either did not give any answer or the answers they gave were incorrect or non-codable.