人教版一年级下册第四单元《100以内数的认识》是有关数的概念的教学内容,是“数与代数领域”内容的一部分。数的概念是整座数学大厦的基础,是重要的数学概念。新教材根据儿童已有的经验、心理发展规律,按照螺旋上升的编排原则将数的概念的教学划分为若干阶段。第一学段出现的整数认识的教学有三次:一是一年级上册 The PEP 4, Unit 4, “Awareness of Number Within 100” is a teaching content of the concept of numbers and is part of the content of “Number and Algebra Areas”. The concept of number is the foundation of the entire math building and is an important mathematical concept. According to the existing experience of young children, the law of psychological development, according to the principle of spiral arrangement of the number of concepts of teaching is divided into several stages. The first section of the emergence of integer recognition of teaching there are three: First, the first grade