"Learning Mathematics in 30 Days" is a book that teaches learning methods and is designed to help children solve the problems they encounter in learning mathematics. This book covers six aspects: secrets for learning mathematics, disclosure of learning skills, introduction to learning methods, mastery of learning essentials, knowledge tips, and easy exercises. It starts with common examples around children. Each part provides practical and effective learning methods, providing systematic solutions to the mathematical problems readers encounter in their studies, allowing children to learn mathematics more easily.