比例的知识在工农业生产和日常生活中有着广泛的应用。比例的应用是在教学了比例的意义和性质,成正、反比例的量的基础上进行教学的,主要包括正反比例的应用题,这是比和比例知识的综合运用。正反比例的应用题,学生在已学过的四则应用题中,实际上已经接触过,只是用归一、归总的方法来解答的。这里 The proportion of knowledge in the industrial and agricultural production and daily life has a wide range of applications. The application of proportion is teaching on the basis of teaching the meaning and nature of proportion, and the amount of positive and inverse proportion, which mainly includes the application of positive and negative proportion, which is the comprehensive application of ratio and proportion knowledge. Positive and negative application of the problem, the students have learned in the four application questions, in fact, have been exposed, but with the return of the total method to answer. Here