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The wrong problem set is very important for mathematics learning. How can you give the best math experts a wrong set of questions?
I have used the wrong math problem set before.

In fact, the wrong problem set is also to be sorted out. First, collect the questions that you can't do, and sort out the questions that you think are a kind.

Then it is to analyze the application of such topics or knowledge points.

Among them, the last thing is to be careful, because the wrong problem set is to clean up the knowledge points you don't need. Maybe you have some feelings about the general method, but you often want to do it but you can't. This is because you have the operation methods about these knowledge points in your mind and have done related topics, but mathematics is flexible and changeable. Don't think it's just a few ways to practice the questions. It can be said that a math problem is just a few small pieces, and several small pieces are put together. What we have to do is to dig out these small pieces one by one as much as possible and use them familiarly.

For example, a problem involves three knowledge points, and each of these three knowledge points will have four or five solutions, then we must choose the method corresponding to the next knowledge point.

Why do we often only know how to do one or two steps, but we can't do anything else? It is because the solution method of this knowledge point does not match the requirements of the following knowledge points, which leads to a dead end. Think about whether the teacher's answer is wonderful. This is because we don't have enough methods and lack of thinking in this regard.

The wrong problem set is to help us exercise this ability.