正、反比例应用题是比和比例知识的综合运用,在小学阶段学习用比例的方法来解答应用题,可以使学生进一步熟练地判断成正、反比例的量,加深对正、反比例概念的理解,加深对数量关系的认识,沟通知识间的联系,提高学生运用所学知识解决实际 Positive and inverse proportion of the application of the ratio and the proportion of knowledge, the comprehensive use of primary school to learn to use the proportion of methods to answer questions, can make students further proficiency in judging the amount of positive and negative, deepen the understanding of positive and inverse proportion of the concept, deepen Understanding of the relationship between quantity, communication, knowledge, and improve the students to use their knowledge to solve the problem