“…Within the scope of all these sub-learning areas, it was observed that several studies were conducted on various topics such as natural numbers and operations with natural numbers (Albayrak et al, 2019;Ercive & Narlı, 2019;Paydar & Doğan, 2021;Tuluk & Akyüz, 2019), fractions and operations with fractions (Altıparmak & Palabıyık, 2019;Topçu & Gürefe 2020;Özer et al, 2020), decimal notations Karataş et al, 2021), rates (Erdem et al, 2018;Yapıcı & Altay, 2017), multipliers and multiples (Karakuş & Yeşilpınar, 2018), sets (Biber & Tuna, 2016;Yücesan, 2011), integers and operations with integers (Berkant & Yaren, 2020;Bozkurt & Polat, 2011;Erdem et al, 2015;Kiraz & Cemalettin, 2020;Şengül & Zengin, 2015), rational numbers and operations with rational numbers (Altun & Çelik, 2018;Gürbüz & Birgin, 2008;Macit & Nacar, 2019;Yenilmez & Yıldız, 2018), ratio and proportion (Deveci, 2021;Güler & Didiş Kabar, 2017;Şengül & Erdoğan, 2017), exponential expressions (Eymen & Duatepe Paksu, 2015;Eymen İkizoğlu & Duatepe Paksu, 2016;Güzel & Yılmaz, 2020) and rooted expressions (Aksu et al, 2013;Aydoğdu, 2020;Toluk Uçar, 2015). In these studies, it was found that the students had deficiencies in reading and writing the numbers, grouping numbers and writing the groups according to their digits after grouping the numbers or they over and under-used the 0 concepts (Albayrak et al, 2019), tended to do different types of errors such as not being able to establish the part-whole relationship in problem posing for operations with fractions, attribute natural number meaning to fraction dimensions, have an inability to ...…”