一、创设有思考价值的问题情境,让学生“思”数学问题是思维的核心,问题的精度和深度决定了思维的准确性和深入性。可以说,问题的空间有多大,学生的思维空间和参与空间就会有多大。但学生的思维及学习活动不可能像科学家一样有序地持续性展开,可能是幼稚的、盲目的或是短暂的。这就要求教师在教学中精心引导,用问题来激发和调动学生积极思考。实践证明:一个有效的问题, First, the creation of a question of thinking value situation, so that students “thinking ” Mathematics is the core of thinking, the accuracy and depth of the question determines the accuracy and depth of thinking. It can be said that the question of how much space, the students thinking space and participation space will be much. However, students’ thinking and learning activities can not be carried out in the same orderly manner as scientists and may be naive, blind or transient. This requires teachers to guide carefully in teaching, with questions to stimulate and mobilize positive thinking students. Practice has proved that: an effective issue,