The Secret of Learning and Thinking is a very popular math book published by a large learning and thinking institution.

The content of this book features the mind map of each exercise.

The official introduction of this set of books is: learning and thinking, creating 12 original mathematical thinking system, created by domestic mathematical experts, to help children easily solve mathematical problems in primary school.

Application problems are half of mathematics, and it is difficult for children who can't do well to improve their math scores. Solving application problems requires comprehensive application of the most basic knowledge in primary school mathematics, such as conceptual nature, laws, formulas, quantitative relations, problem-solving methods and so on.

You also need the ability to analyze, synthesize, judge and reason.