In this paper so-called mathematical representations are considered as sign-games in the meaning of Wittgenstein. In these sign-games, meaning results from the use of inscriptions due to given rules. These usage rules are combined into roles of the involved inscriptions. This view offers a wealth of possible explanations for the function and the interaction of so called mathematical representations. In the course of the following considerations, advantages of this view are explained theoretically and made available for the practice of teaching mathematics by means of given examples.