Mental Arithmetic at 10X Speed: 56 Mental Arithmetic Skills for Primary and Secondary School Students

An eye-catching book. But I was a little anxious while watching it. I just read it all back without taking any notes. I think I need to read it again to review the previous things and make complete notes. There will be some pain when doing calculations, but it is also a good opportunity to exercise your brain power, but I just want to give up. God knows, I read it for a long time and only got to Chapter 1, Section 23. .

This book is really good! It contains many practical mental arithmetic skills, and it also integrates these skills into life scenes, making it fun for children to learn and easier to understand. I especially like the case teaching in the book, which is very helpful in cultivating children's mathematical thinking. However, I kind of hate some of the small exercises in the book. I think they are a bit difficult, but the "slow-motion problem-solving ideas" given by the author are still very useful. Overall, this book is very helpful for children to improve their math scores. I think it is worth recommending!

This book is very good, suitable for primary school or junior high school children to read. The whole book is a process from shallow to deep. The methods in it are very useful. Just read the first half. It has made a big progress in basic addition, subtraction, multiplication and division within 100. It uses commutative law and associative law. For people like me It is also helpful for older children. They didn't understand it in elementary school and had a headache when they saw numbers. But after seeing the method in the book, it turns out that they can still calculate like this. The second half of the content is a little more difficult, involving arithmetic sequences, geometric sequences, quadratic equations, etc. Junior high school students can read it. It is very helpful. The book is not long and is worth recommending.