★ 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 & Direction
  Lesson 01　Position & Direction　–　Red Fox
  Math Fun　Integrated Activity (p.5)
II. Fraction Multiplication & Division
  Lesson 02　Simplifying Calculations　–　Who’s Cutting the Trees?
  Lesson 03　Drawing to Solve Problems　–　The Weird Dream
  Lesson 04　Transforming the Unit “1”　–　Town Residents
  Lesson 05　Classification Discussion　–　Rolling-Stone Wild Boar
  Lesson 06　Solving by Equations　–　Nine-Horn Letter Promise
  Lesson 07　Engineering Problems　–　The Battle
  Lesson 08　Working-Backwards Method　–　Master Nine
  Math Fun　Integrated Activity (p.44)
III. Ratio
  Lesson 09　Applications of Ratio (I)　–　Rebuilding Home
  Lesson 10　Applications of Ratio (II)　–　Math-Problem Consultant
  Math Fun　Integrated Activity (p.55)
IV. Circle
  Lesson 11　Circumference of a Circle　–　The Last Drop in the Desert
  Lesson 12　Area of a Circle　–　Water Baby
  Math Fun　Integrated Activity (p.68)
V. Percentages (I)
  Lesson 13　Percentage Problems　–　The Destroyer
  Lesson 14　Number-Assignment Method　–　A Barrel of Gunpowder
  Lesson 15　Meeting Problems in Percentages　–　Power Girl
  Lesson 16　Marketing Problems in Percentages　–　The Terrible Rumor Machine
  Math Fun　Integrated Activity (p.88)
VI. Pie Charts
  Lesson 17　Pie Charts　–　Return to Humanity
  Math Fun　Integrated Activity (p.94)

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Part 2
I. Negative Numbers
  Lesson 01　Negative Numbers　–　Crazy Travel Camp
II. Percentages (II)
  Lesson 02　Discount & Fractional Rates　–　Shrewd Merchant Cat
  Lesson 03　Interest Problems　–　The Upper-Bunk Teen
  Lesson 04　Concentration Problems　–　The Living Fridge
  Math Fun　Integrated Activity (p.115)
III. Cylinders & Cones
  Lesson 05　Cylinder Nets　–　Golden Button
  Lesson 06　Surface Area of a Cylinder　–　The Freezing Fellow
  Lesson 07　Volume of a Cylinder　–　The Answer to the Riddle
  Lesson 08　Volume of a Cone　–　Cloud-Water Ballad
  Lesson 09　Capacity of Cylinders & Cones　–　The Wonder of the World Tower
  Math Fun　Integrated Activity (p.141)
...