《数学课程标准》指出“创设与学生生活环境、知识背景密切相关的,又是学生感兴趣的学习环境,让学生在观察、操作、猜测、交流、反思等活动中逐步体会数学知识的产生、形成和发展的过程;获取积极的情感体验;感觉数学的力量,同时掌握必要的基础知识和基本技能”。因此,在教学中教师要密切联系学生的生活实际,从学生熟悉的生活情景和感兴趣的事物出发,创设生活情境,为他们提供观察、操作、实践的机会,培养学生自主探究的能力。一、创设生活情境,调动学生探究动机 The standard of mathematics curriculum states that “to create a learning environment that is closely related to students’ living environment and knowledge background is also a learning environment that students are interested in, so that students can gradually realize the production of mathematical knowledge in such activities as observation, operation, speculation, exchange and reflection , The formation and development of the process; access to a positive emotional experience; feel the power of mathematics, while mastering the necessary basic knowledge and basic skills ”. Therefore, in the process of teaching, teachers should closely contact with students’ actual life, start from the students’ familiar life situations and interesting things, create life situations, provide them with opportunities of observation, operation and practice, and cultivate students’ ability of self-exploration. First, create a life situation, mobilize students to explore motivation