And easily win the championship. If the child is particularly excellent, I recommend training excellent math. Personally, I don't particularly recommend it, because the first stage is still the time to lay the foundation, which is not suitable for a large number of papers. Just give it to students and school teachers.

I believe many young people in their twenties and thirties are familiar with the middle point of this book. This is really a classic workbook that runs through primary school, junior high school and senior high school. Best of all, he can clearly tell you that the test site type of each question does not require children to spend too much time summarizing the methods they have done, and the methods corresponding to the types can be clearly seen directly in the workbook. However, his topic is really tricky and difficult. I hope students don't blindly pursue difficult problems and waste too much time doing them.