I am a primary school math teacher, and the third grade math is a preliminary understanding of the average, so here we need to give a preliminary definition of the average: the average in primary school math generally refers to the arithmetic average, that is, the quotient obtained by dividing the sum of a set of data by the number of this set of data. At the same time, the average is an important statistical method, a quantity representing the trend in a set of data sets, and an indicator reflecting the trend in the data sets. The characteristics of competitive sports determine that what people need to know is the gap between the two sides, rather than adding up the data of both sides and taking the average. The average number of goals scored by the two teams in the same game here lacks purpose, and the data reflected is meaningless. This question seems to be correct, but it actually goes against people's common sense of thinking, so it is understandable to say that it is wrong. However, as a junior three student, it is too difficult to understand such a problem. In teaching, it can be said that averaging such data is meaningless. With the improvement of students' cognitive level, such problems will not be a problem.

You can also simply use an example to illustrate that when you go to the mall to buy the same thing (such as TV), the price of a merchant is 5000 yuan, and the price of a merchant is 4500 yuan. At this time, I believe that everyone must consider the gap between A and B, not the average of the two!