Developing a Model to Support Students in Solving Subtraction

dc.creator	Nila Mareta Murdiyani
dc.creator	Zulkardi
dc.creator	Ratu Ilma Indra Putri
dc.creator	Dolly van Eerde
dc.creator	Frans van Galen
dc.date	2013-01-01T00:00:00Z
dc.date.accessioned	2015-07-20T22:13:31Z
dc.date.available	2015-07-20T22:13:31Z
dc.identifier	2087-8885
dc.identifier	https://doaj.org/article/d5c96d3a9bf14e658cdda4b22d4324af
dc.identifier.uri	http://evidence.thinkportal.org/handle/123456789/16067
dc.description	Subtraction has two meanings and each meaning leads to the differentstrategies. The meaning of “taking away something” suggests a directsubtraction, while the meaning of “determining the difference betweentwo numbers” is more likely to be modeled as indirect addition. Manyprior researches found that the second meaning and second strategy rarely appeared in the mathematical textbooks and teacher explanations, including in Indonesia. Therefore, this study was conducted to contribute to the development of a local instruction theory for subtraction by designing instructional activities that can facilitate first grade of primary school students to develop a model in solving two digit numbers subtraction. Consequently, design research was chosen as an appropriate approach for achieving the research aim and Realistic Mathematics Education (RME) was used as a guide to design the lesson. This study involved 6 students in the pilot experiment, 31 students in the teaching experiment, and a first grade teacher of SDN 179 Palembang. The result of this study shows that the beads string could bridge students from the contextual problems (taking ginger candies and making grains bracelets) to the use of the empty number line. It also shows that the empty number line could promote students to use different strategies (direct subtraction, indirect addition, and indirect subtraction) in solving subtraction problems. Based on these findings, it is recommended to apply RME in the teaching learning process to make it more meaningful for students.
dc.language	English
dc.publisher	Indonesian Mathematical Society
dc.relation	http://jims-b.org/?download=66
dc.relation	https://doaj.org/toc/2087-8885
dc.source	Journal on Mathematics Education, Vol 4, Iss 1, Pp 95-112 (2013)
dc.subject	Subtraction
dc.subject	Design Research
dc.subject	Realistic Mathematics Education
dc.subject	The Beads String
dc.subject	The Empty Number Line
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	DOAJ:Education
dc.subject	DOAJ:Social Sciences
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	DOAJ:Education
dc.subject	DOAJ:Social Sciences
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.subject	Special aspects of education
dc.subject	LC8-6691
dc.subject	Education
dc.subject	L
dc.title	Developing a Model to Support Students in Solving Subtraction
dc.type	article