★ 185 core mathematical concepts have been successfully transformed into 185 adventure stories! This allows children to naturally grasp essential math concepts, from basic operations to logical thinking, through enjoyable reading, subtly cultivating a mathematical mindset that will benefit them for life.

★ Each book is enhanced with mathematical diagrams and exquisite illustrations, and features carefully designed interactive sections like "Math in Action Games" and "Brain Teaser Puzzles" (19 games + 47 puzzles in total). It also comes with scannable QR codes for listening to audio recordings of the stories.

★ Mathematics is a wondrous world waiting to be explored, filled with stories, puzzles and treasures.

This 6-volume series aims to build a complete, engaging, and systematic mathematical world for primary school children.

The core innovation of the series lies in transforming 185 key mathematical knowledge points into 185 independent adventure stories. Children will follow the protagonists as they travel through time and space, solve puzzles, and explore secret realms. They will learn the rules of arithmetic in the "Kingdom of Numbers," discover the mysteries of shapes in the "Castle of Geometry," and hone their reasoning and problem-solving skills in the "Labyrinth of Logic."

Each volume is scientifically graded according to the difficulty of concepts, ensuring progressive learning. The books not only tell stories with vivid language but also use clear mathematical charts and beautiful full-color illustrations to visualize abstract concepts, revealing the connections between ideas and significantly lowering the barrier to understanding.

Beyond the exciting storylines, the books feature two major interactive sections: "Math in Action Games" and "Brain Teaser Puzzles." Children can reinforce their knowledge through 19 fun, hands-on games and expand their thinking by tackling 47 classic puzzles. Additionally, professionally narrated audio is available to accompany the text.

This series shows children that mathematics is not just symbols on a classroom blackboard, but a master key for solving real-world problems and understanding how the world works.

The R&D Team

This is a dedicated collective comprised of senior education experts, teaching researchers, and frontline teachers with extensive experience in competition coaching. They possess a deep understanding of the cognitive development patterns of primary school children and have accurately pinpointed the intersection between China's basic education curriculum standards and advanced skill development. The team's core work goes beyond mere compilation of exercises; it involves "educational design". Everything from the overall curriculum planning and gradient setting of teaching progressions to the strategic arrangement of each model problem and practice exercise undergoes repeated scrutiny to ensure the efficacy of its methodology (the "modular" teaching model). This approach of driving product innovation through professional pedagogical research guarantees the content's foresight and practicality.

Part 1
I. Position
  Lesson 01　Position　–　The Gambling King
  Math Fun　Integrated Activity (p.5)
II. Observing Objects
  Lesson 02　Observing Objects　–　The 100-m Champion Who Ballooned
III. Decimal Multiplication & Division
  Lesson 03　Simplifying & Clever Calculations　–　The Invisible Prankster
  Lesson 04　Estimating to Solve Problems　–　The Auto-Painting Artist
  Lesson 05　Billing Problems　–　The New-Gen Teaching Queen
  Lesson 06　Cycles in Recurring Decimals　–　Back to Original Shape
  Lesson 07　Exploring Patterns in Expressions　–　Sailing Across the Sky
  Lesson 08　Rounding Up & Truncating to Solve Problems　–　The Herculean Man
IV. Probability
  Lesson 09　Probability　–　A Sticky Bet
V. Simple Equations
  Lesson 10　Using Letters for Numbers　–　Who Is the Winner?
  Lesson 11　Solving Problems with Equations (I)
  Lesson 12　Solving Problems with Equations (II)
  Math Fun　Integrated Activity (p.63)
VI. Area of Polygons
  Lesson 13　Area of Composite Figures (I)　–　Iron-Clad Promise
  Lesson 14　Area of Composite Figures (II)　–　Indestructible Cockroach
  Math Fun　Integrated Activity (p.74)
VII. Motion of Figures
  Lesson 15　Motion of Figures　–　Grandmother of Lord Purple-Pear

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Part 2
I. Factors & Multiples
  Lesson 01　Finding Factors & Multiples　–　Stargazer Villa
  Lesson 02　Features of Multiples of 2, 5, 3　–　Mysterious Flame
  Lesson 03　Odd & Even Numbers　–　Magic Soar
  Lesson 04　Prime & Composite Numbers　–　The Strange New Neighbor
  Math Fun　Integrated Activity (p.100)
II. Cuboids & Cubes
  Lesson 05　Understanding Cuboids & Cubes　–　Who Is the Mystery Cat?
  Lesson 06　Surface Area of Cuboids & Cubes　–　Coal Ball & Gem
  Lesson 07　Volume of Cuboids & Cubes　–　Forest Patrol Page
  Lesson 08　Capacity of Cuboids & Cubes　–　Ancient Riddle
  Math Fun　Integrated Activity (p.120)
……