Abstract
Over 3000 students in Grades 4 to 10 completed about 10000 tests to identify and track their conceptions about decimal notation. This paper reports the incidence of two particular error-patterns on these tests and how this incidence changes over time, from cross-sectional and longitudinal viewpoints. At some time, approximately 3% of students answered almost all test items incorrectly and over 10% were unable to compare decimal numbers with the same tenths and hundredths digits. Explanations for these error-patterns are given.
Vicki Steinle & Kaye Stacey
Further Evidence Of Conceptual Difficulties With Decimal Notation