As a junior high school student, I can tell you clearly that the math problems in primary schools are not helpful, but some Olympic math problems are still very important. First of all, after entering junior high school, the knowledge learned began to change greatly. In elementary school, we studied various operations, but in junior high school, we only need to use the first unit (rational number) of senior one, but the number of operations is generally no more than ten times (excluding scientific counting). You know, the five thoughts in junior high school have little to do with primary school knowledge. To tell the truth, at this stage of junior high school, all you have to learn is algebra and geometry. In contrast, what is more important is the idea of equation, which has little to do with the complicated calculation in primary school. But some elementary school olympiad math problems are very helpful to junior high school mathematics. For example, in the chapter of ternary linear equation, the basic ideas of primary schools are very demanding. Maybe you don't realize it now, but in junior high school, you will find how important it is to learn equations by solving various problems and thinking. Give a simple example: engineering problem: there are three engineering teams A, B and C to complete a project. It takes 3 days for A and B, 5 days for B and C, and 6 days for C and D. How long does it take for A, B and C to complete the project together? According to the elementary school's solution:1/3+1/5 = 8/1/3+1/5+1/6 = 30/90+/kloc-. But this is impossible in junior high school, because the requirement of junior high school is to let you see through the essence of this problem and then transform it into a very simple equation (I won't write it). This is the connection between junior high school topics and primary school olympiad. Finally, I tell you: it is good to do more Olympic math in primary schools, but you must see the essence of the topic clearly, analyze it clearly, and try to convert it into an equation, otherwise you might as well not write it. In addition, there is no need to write a lot of simple calculation questions. You only need to know a few basic calculation rules in junior high school. Can you adopt them?