讲和练是数学教学的重要环节。只有处理好讲与练的关系,才能减轻学生负担,提高教学质量。讲课要力求精辟。所谓精辟,首先是要讲在点子上,把关键的东西讲清、讲透。如讲解概念,不仅要讲清概念的实质,还要讲清概念之间的联系和异同,做到脉胳清晰,要言不繁。统编小学数学第八册《数的整 Teaching and practicing is an important part of mathematics teaching. Only by properly handling the relationship between speaking and practice can we reduce the burden on students and improve the quality of teaching. Lectures should be brilliant. The so-called incisive, the first is to talk about ideas, to clarify the key things, tell. Such as explaining the concept, not only to clarify the essence of the concept, but also to clarify the relationship between the concepts and similarities and differences, so that the pulse is clear, not to be complicated. Unified Primary Mathematics eighth book "the whole number