在数学教学中,教师在讲解完例题、习题之后,常常要对问题进行引申。引申主要是指对例题、习题等进行变通推广,重新认识,让学生得以深刻掌握知识点。恰当合理的引申,能营造一种生动活泼、宽松自由的学习氛围,可开阔学生的视野,激发学生的学习兴趣,培养学生 In mathematics teaching, after explaining problems and exercises, teachers often have to extend the problem. Extension mainly refers to the modification of examples, exercises, etc., to re-understand, so that students can have a deep knowledge of knowledge. Appropriate and reasonable extension can create a lively, relaxed and free learning atmosphere that can broaden students’ horizons, stimulate students’ interest in learning, and cultivate students