AKBAYIR, K.; AKÇA, A. AN INVESTIGATION ON HOW MUCH THE SECONDARY SCHOOL STUDENTS LEARN THE PLACE VALUE CONCEPT IN NATURAL NUMBERS. International Journal of Social and Humanities Sciences Research (JSHSR), [S. l.], v. 4, n. 15, p. 2149–2158, 2017. DOI: 10.26450/jshsr.295. Disponível em: https://jshsr.org/index.php/pub/article/view/2270. Acesso em: 30 haz. 2024.