《算术理论》是省教育厅组织编写的云南省小学教师业余进修教材。目前各师范学校使用的算术理论教材,一般采用拉丁字母代数进行论证。这样论证比较严密,但自学较为困难。为方便教师自学,《算术理论》多采用实例,以说明方式论述。小学数学教学大纲要求小学数学教学要渗透现代数学集合的思想。教材体现了这一婴{求。木来,集合知识应编入代数内容,用专门的章节进行论述,但考虑到有的教师可能先学算术理论,所以,本书将集合的 “Arithmetic theory” is the province of education department organized by primary school teachers in Yunnan Province spare time teaching materials. At present, normal school teachers use arithmetic theory textbooks to use Latin algebra to demonstrate. This argument is more rigorous, but self-study is more difficult. In order to facilitate teachers' self-study, “arithmetic theory” mostly uses examples to illustrate the way of discussion. Elementary mathematics syllabus requires elementary mathematics teaching to penetrate the modern mathematical collection of ideas. Textbook reflects the baby {beg. Mu Lai, the collection of knowledge should be incorporated into the algebra content, with a special chapter to discuss, but considering that some teachers may be learning arithmetic theory, so the book will be assembled