谈有理数运算中符号的处理·荣富成在有理数运算的教学过程中，学生们感到困难的、出错率较高的问题，便是运算符号的处理，不是弄错符号，便是丢了负号，该如何解决这一问题呢？一、当数扩充到有理数域后，对有理数要有一个明确而清晰的认识，有理数和小学所学的数有明显... Talking about the processing of symbols in rational number operations · Rong Fucheng In the teaching process of rational numbers, the problem that students feel is difficult and the error rate is high is the processing of arithmetic symbols. If they are not mistaken, they lose the negative sign. How to solve this problem? First, when the number is expanded to the rational number field, there should be a clear and clear understanding of rational numbers, and the numbers learned by rational numbers and primary schools are obvious...