What is the difference between the regional version and the national version of the 3-year simulation (mathematics) for the 5-year senior high school entrance examination and the special version for students? Regional specialization is suitable for the independent proposition of provinces, such as Shanghai, Beijing, Tianjin and other first-tier cities, and the topic tends to be simple;

The student version focuses on the description of problem-solving ideas and skills, which is relatively easy to use.

The Chinese version of the needle problem is difficult and complicated, so teachers can use it. There will be some famous teachers' insights to enrich classroom teaching.

I hope it helps you!