Hande Gülbağcı Dede, Sare Şengül. “An Investigation of Pre-Service Elementary and Secondary Mathematics Teachers’ Number Sense”. Turkish Journal of Computer and Mathematics Education (TURCOMAT) 7, no. 2 (August 4, 2016): 285–303. Accessed May 3, 2024. https://turcomat.org/index.php/turkbilmat/article/view/127.