★ 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. Units of Length
  Lesson 01　Comparing Lengths　–　The Secret of Hyacinth
  Lesson 02　Measuring Lengths　–　Who Stole the Crystal Box?
  Math Fun　Integrated Activity (p.5)
II. Addition & Subtraction Within 100
  Lesson 03　Easy Ways for Sequential +/-　–　The Magic Cloak
  Lesson 04　Mixed Addition & Subtraction　–　The Puppet Cat at the Bazaar
  Math Fun　Integrated Activity (p.18)
III. Preliminary Angle Concepts
  Lesson 05　Acute, Right & Obtuse Angles　–　Hyacinth’s Garden
  Math Fun　Integrated Activity (p.24)
IV. 1–5 Multiplication Tables
  Lesson 06　Tables of 5 & 2　–　Nutty Town
  Lesson 07　Tables of 3 & 4　–　Who is the Little Whirl?
  Lesson 08　Multiplying-then-Adding　–　The Special Dumpling
  Lesson 09　Multiplying-then-Subtracting　–　The Magic Chestnut
  Math Fun　Integrated Activity (p.42)
V. Observing Objects
  Lesson 10　Viewing the Same Object from Different Directions　–　The Riddle-loving Dice
  Math Fun　Integrated Activity (p.47)
VI. 6–9 Multiplication Tables
  Lesson 11　Table of 6　–　Treasure-Hunt Garden
  Lesson 12　Table of 7　–　Miss Seven-Horn Goat’s Hair-tie
  Lesson 13　Table of 8　–　Eight-Point Deer’s Maze Castle
  Lesson 14　Table of 9　–　Uncle Nine-Tail Fox & His Strange Son
VII. Telling Time
  Lesson 15　Hours & Minutes　–　Grandma New-Year’s Reunion Dumplings
  Lesson 16　Converting Time Units　–　Wishing Candy

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Part 2
I. Data Collection & Organization
  Lesson 01　Data Tables　–　The Alien
II. Division Within Multiplication Tables
  Lesson 02　Using Table of 5 to Find Quotients　–　The Math-Mind Collector
  Lesson 03　Using Table of 4 to Find Quotients　–　Bubble Gum Stronger than a Bear
  Math Fun　Integrated Activity (p.86)
III. Motion of Shapes
  Lesson 04　Axis-Symmetric Figures　–　The Universal Overcoat
  Lesson 05　Translation & Rotation　–　The Crazy Ferris Wheel
  Math Fun　Integrated Activity (p.96)
IV. Mixed Operations
  Lesson 06　Solving Mixed Ops by Drawing　–　Careless Town
  Lesson 07　Order of Operations　–　The Ridiculous Magic
V. Division with Remainders
  Lesson 08　Division with Remainders　–　The Magic Flower Basket
……