De Castro Hernández, Carlos and Castro Martínez, Enrique and Segovia Álex, Isidoro (2002) Influence of number type and analysis of errors in computational estimation tasks. In Proceedings of the 26th Conference of the International group for the Psychology of Mathematics Education. University of East Anglia, Norwich, UK, pp. 201208. ISBN 0953998363

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Abstract
In this study we analyze the difficulty of computational estimation tasks –with operations without context– in function of the operation type –multiplication and
division– and number type –whole, decimal greater than one and decimal less than one– that appears in them. Errors made in estimating with decimal numbers less than one are also analyzed. The research counts with the participation of 53 preservice elementary teachers. An estimation test is administered to the teachers and some of them are selected to accomplish interviews. The conclusion is that estimating with decimals less than one is more difficult than with whole numbers or decimals greater than one, and most of the errors –but not all– produced in estimation processes is
due to teachers’ misconceptions about operations of multiplication and division.
Item Type:  Book Section 

Uncontrolled Keywords:  Mathematics Education, Computational Estimation, Decimals, Errors, Teacher Education, Educación Matemática, Estimación en cálculo, Decimales, Errores, Formación de Maestros 
Subjects:  Humanities > Education > Mathematics study and teaching 
ID Code:  12633 
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Deposited On:  04 May 2011 11:19 
Last Modified:  06 Feb 2014 09:29 
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