《小学数学新课程标准》中提出:“教学活动是师生积极参与、交往互动、共同发展的过程。有效的教学活动是学生学与教师教的统一,学生是学习的主体,教师是学习的组织者、引导者与合作者。数学教学活动应激发学生兴趣,调动学生积极性,引发学生的数学思考,鼓励学生的创造性思维。”要让学生乐于去学习,善于去发现,激发起学生的创造性思维,教师就要有目的有意识地创设各种合适的 The “New Curriculum Standard for Primary Mathematics” put forward: “Teaching activities are the process of active participation, interaction and mutual development between teachers and students.” Effective teaching activities are the unification of student learning and teacher education, students are the main body of learning, and teachers are learning The organizers, guides and collaborators.Mathematics teaching activities should stimulate students interest, mobilize the enthusiasm of students, triggering students’ mathematical thinking, to encourage students to creative thinking. "To make students willing to learn, good to find, inspire students Creative thinking, teachers should purposefully create a variety of appropriate