在教学实践中产生疑惑:这样的导入是否牵强?让学生从数学的角度发现问题、理解问题,并能综合运用所学知识和技能解决问题,逐步培养学生的抽象思维能力和数学眼光,这未尝不是数学教学的目标之一。数学的魅力主要体现在“准”“简”二字,改进后的教学设计删繁就简,开门见山,水到渠成,效果很好。 There are doubts in the teaching practice: whether this introduction is far-fetched? Let students find problems and understand problems from the perspective of mathematics, and can comprehensively apply the knowledge and skills learned to solve problems, and gradually cultivate students’ abstract thinking ability and mathematics vision. Not one of the goals of mathematics teaching. The charm of mathematics is mainly reflected in the word “precise” and “simply”. The improved teaching design is simple, straightforward, and straightforward. It works well.