“…In a final step, S6 explains that he now has to compensate, e.g., subtract the rounded up "two" from the interim result/ term ("but bu yanlış, because we have to iki artı yapcaz", translated as "but that's wrong, because we have to add two/ plus", see turn 80). Even though the explanation here tends to appear procedural, first facets of a conceptual explanationof an explanation-WHY -also become assumable, as S6 not only uses symbolic language means but also cardinal manipulatives (cubes, bars, and plates) accompanied by domain-specific language means (Bauersfeld 1983;Kuzu, 2019Kuzu, , 2022b, for example when expressing cardinal actions by using language means such as "take away…" and "add…" (see turn 80). In this conceptually illustrated explanation, thus first conceptual aspects behind the procedure in the sense of so-called 'procepts', being an "amalgam of both process and concept, [...] the manifestation of the process itself, which can be manipulated as a mental object" (Gray & Tall 1992, p. 210), are interpretable.…”