聋校数学实验教材第十册第一单元小数除法中的循环小数是个新知识点,这部分内容概念较多且抽象,也是教学上的一个难点。聋生虽然对日复一日、昼夜交替、四季周而复始等生活中的轮回现象有一定认识,但由于其听力障碍,因此接触外界的信息比较少,对高度抽象、浓缩的数学概念如“依次不断”、“重复出现”、 Deaf school mathematics experiment textbook tenth unit first unit decimal fraction is a new knowledge of the decimal point, this part of the concept of more and more abstract, but also a teaching difficult. Although deaf students have some understanding of the reincarnations in daily life such as day after day, day and night, and the seasons again and again, they have less contact with the outside world due to their hearing impairment. For highly abstract and condensed math concepts such as “ Constantly ”, “ recurring ”,