“…So it can be said that understanding the concept is the most important part of learning. This is as stated by (Herawaty, Widada, Nugroho, & Anggoro, 2019;Magfirah et al, 2019;Sadikin & Kaharuddin, 2019) that mathematics subjects emphasize concepts, meaning that in studying mathematics students must understand mathematical concepts first to be able to solve problems and be able to apply the learning in the real world. By understanding a concept students can know, explain, describe, compare, differentiate, classify, give examples and not examples, conclude and reexpress an object in its language by being aware of the processes it goes through (Pasnak et al, 2016;Young & Shtulman, 2020).…”