Addition and subtraction calculation strategies based on the decimal nature of the numbering system: explorations in the 2nd year of schooling
AUTHORS
Carlos Pereira dos Santos | cmfsantos@fc.ul.pt | University of Lisbon
Claudia Carreiro | EBI of Ribeira Grande
Eduarda Correia | EBI of Ribeira Grande
John Patrick | EBI of Ribeira Grande
Ricardo Cunha Teixeira | ricardo.ec.teixeira@uac.pt | NICA-UAc & FCT-UAc
SUMMARY
The authors analyze addition and subtraction calculation strategies based on the decimal nature of the numbering system, including the necessary prerequisites. These dynamics were implemented in public schools in the Azores, between September 2015 and July 2021, in the context of the Prof DA Project of the “ProSucesso-Açores pela Educação” Program, of the Government of the Azores, and the “Mathematics Step by Step” Workshop, of the University of the Azores.
KEYWORDS
Workshop “Step by Step Mathematics”, calculation strategies, addition, subtraction, 1st Cycle of Basic Education
RELEVANT DATES
Published: 2021/11/04
Received: 2021/06/01