围绕教学内容和目标,关注练习题的目的性、逻辑性、层次性和多维目标的融合,通过有效训练,拓展学生数学思维。练习题是教师在课堂上基于一定的教学目的或针对具体的学习内容,用来促进学生思维发展、提高学生解决问题能力的题目,它不同于复习资料上的成题,也不等同于中考试题,不能拿来主义,必须根据教与学的需要加以辨别、改编和精选。成功的课堂教学必须有高质量的练习题做基础,教学中所选的练习题既要反映基本概念、基本原理,又要反映学生应掌握 Focus on the teaching content and goals, pay attention to the integration of purpose, logic, hierarchy and multidimensional goals of exercises, and expand students’ mathematical thinking through effective training. Exercises are teachers in the classroom based on certain teaching purposes or for specific learning content, used to promote the development of student thinking, improve students’ ability to solve problems, it is different from the review of information into the problem is not the same as the exam questions , Can not be used, must be based on teaching and learning needs to be identified, adapted and selected. Successful classroom teaching must be based on high-quality exercises, exercises selected in the teaching should reflect both the basic concepts and basic principles, but also reflect the students should grasp