★ 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. Understanding Large Numbers
  Lesson 01　Greatest & Smallest　–　Newzi Kong & the Hornet Swarm
  Lesson 02　Exploring Patterns　–　Mum Shuang’s Secret
  Lesson 03　Ordering by Size　–　Treasure Hunt in the Palace
  Lesson 04　Completing Figures　–　The Feather Letter in the Chip Bag
  Math Fun　Integrated Activity (p.18)
II. Measuring Angles
  Lesson 05　Counting Line Segments　–　Surprise Revival Contest
  Lesson 06　Counting Angles　–　The Chosen Child
  Lesson 07　Calculating Angle Measures　–　The Great Vanishing Act
  Math Fun　Integrated Activity (p.32)
III. 3-Digit × 2-Digit Multiplication
  Lesson 08　Multiplication Puzzles　–　Invisibility Cloak
  Lesson 09　Reasoning in Equations　–　Code Keyboard
  Lesson 10　Greatest Product　–　Screaming Cat
IV. Parallelograms & Trapezoids
  Lesson 11　Perpendicular & Intersecting Lines　–　Stone Statue’s Power Meal
  Lesson 12　Parallelograms & Trapezoids　–　Secret in the Tunnel
  Math Fun　Integrated Activity (p.57)
V. Division by Two-Digit Divisors
  Lesson 13　Checking Division　–　Mysterious Camp
  Lesson 14　Finding Truth in Errors　–　The Best and Worst Sameness
  Lesson 15　Patterns in Quotient Changes　–　The Two Magicians
  Math Fun　Integrated Activity (p.72)

Part 2
I. Four Fundamental Operations
  Lesson 01　Operational Reasoning　–　Steamed Snail’s Little Flower Car
  Lesson 02　Clever 24 Game　–　Devil Dentist & Tool Shed
  Lesson 03　Renting Boats Wisely　–　Cherry-Red Frog
  Math Fun　Integrated Activity (p.88)
II. Observing Objects
  Lesson 04　Viewing Objects　–　Gold-Pile Maze
  Math Fun　Integrated Activity (p.94)
III. Laws of Operations
  Lesson 05　Simplifying +/-　–　Queen Chicken Diner
  Lesson 06　Simplifying ×　–　Who Is Little Flower Car?
  Math Fun　Integrated Activity (p.104)
IV. Decimals
  Lesson 07　Moving the Decimal Point　–　Decimal-Point Phobia
  Lesson 08　Greatest & Smallest Decimals　–　The Lawsuit
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