问题是数学的心脏.创设问题情境是为了满足学生认识的需要,它能提供学生学习数学的内驱力,激发学生学习的兴趣,调动学生的学习积极性,从而促使学生主动参与,自觉积极地进入特定的学习状态.也使得学生的认知过程变为一个再创造的过程,学生在自觉、主动、深层次的参与过程中,实现 The problem is the heart of mathematics. The problem situation is created to meet the needs of students’ understanding. It can provide students with internal driving force for learning mathematics, inspire students’ interest in learning, and mobilize their enthusiasm for learning, thus urging students to take the initiative to participate and consciously and aggressively enter. The specific learning status also makes the student’s cognitive process a re-creation process, and students realize in a conscious, active, and in-depth participation process.