在人教版的各册数学教材中,编者均有针对性地设置了课后拓展材料。主要有“你知道吗”和思考题两种形式。第一种形式主要包含四个方面:数学史、数学知识介绍、生活中的数学以及生活常识与信息;第二种形式是数学思考题。这些思考题一般出现在课后巩固练习题或练习课之中,主要是对书本知识的拓展与提高。这些拓展材料丰富了教材 In the PEP teaching book, the editors have set up after-school materials to expand. There are two main forms of “Do you know?” The first form mainly includes four aspects: the history of mathematics, the introduction of mathematical knowledge, the mathematics in life and common sense and information; the second form is the subject of mathematical thinking. These questions generally appear in the exercises to consolidate exercises or classes after class, mainly the expansion and improvement of the book knowledge. These extended materials enrich the textbook