In this article we will discuss, through the explanations given by teachers who teach Mathematics, the importance of using teaching strategies in the implementation of tasks. Teachers who participated in it belong to the group "Observatory Mathematics Education" (OME-Bahia). This study was framed in a qualitative approach and data were collected through observation and an interview. The interview was conducted taking into account the observation produced through videos where the implementation of mathematical tasks was recorded, serving as support different times where teachers used different teaching strategies in order to take them up again at the time of the interviews. The results showed that in the using of each teaching strategy, there is a particular importance that is assumed by the teacher; that means, their intentions are subject to different variables.