A math extracurricular book recommended for fifth graders is "Master of Mathematics Enlightenment". This book mainly introduces interesting and exciting math problems and how to solve them. It contains a large number of exercises and solutions to help students consolidate the math knowledge they have learned.

In addition, the book also contains some interesting math stories and interesting math problems, which can stimulate students' interest in learning and improve their mathematical thinking ability.

The book also has many illustrations and charts, making abstract math concepts easier to understand. In short, "Master of Mathematics Enlightenment" is an entertaining math book suitable for fifth graders to read, which can help them improve their math level and cultivate their interest in math.

1. "Mathematics Help" (25 volumes)

(US) Rosa Santos

Xinlei Publishing House

2. "Oh My God! Mathematics can be learned in this way” (Japan) Tetsu Noguchi Shaanxi Normal University Press 3. “The Wonderful Kingdom of Numbers” Li Yupei China Juvenile & Children’s Publishing House 4. “Li Yupei’s Mathematical Fairy Tales” (lower grades of primary school) Li Yupei Dolphin Publishing House

3. "The Adventures of Math Geek" series - Author: Lugoski

This series of books uses storytelling to lead children to explore various wonderful phenomena and problems in mathematics, and enhance their ability to explore and think about mathematics.

4. "Math Training Paradise" - Author: Huang Daojie

This book uses a variety of exercises to allow children to consolidate their mathematical knowledge and improve their problem-solving skills without pressure, while cultivating their mathematical thinking and logical abilities.

5. "Math Magic" - Author: Woprusk

This book shows some wonderful phenomena and techniques in mathematics in the form of magic, allowing children to learn and experience the fun of mathematics in practice.

The above are some recommendations for extracurricular mathematics books suitable for fifth graders. You can choose suitable books according to your child's interests and reading level.

《Godvin, Escher, Bach – A Collection of Different Walls》 《Chinese Science and Technology Dictionary. Mathematics, Physics and Chemistry》 《The Number of Life: Explaining the Existence of Life with Mathematics》 《Mathematical Legends: Those Unreachable Figures》

Mathematical Readings Suitable for Fifth Graders

1. 《Mathematics is Everywhere in Life》. Contents include the division of horses, Afanti’s punishment of Aishan, Xu Wenchang helping Uncle Wang sell chickens, coprime numbers in cups, mathematical problems in RMB, Afanti’s division of meal money, Guo Moruo’s clever solution to birthday riddles, wrong decimal points, digital lantern riddles, mathematics in blessing text messages, rich man’s bet, Afanti’s guess about pearls

2. 《How Much Do You Know about Mathematics Revealed》. Contents include beautiful tree planting patterns, reverse conversion to cleverly hold coins, drawer principles and computer fortune-telling, math problems on fingers, interesting math problems, reverse reasoning, Alibaba's deception, early use of new calendars, revealing the scam of touching the ball, the "end of the world" legend, and compiling codes. 3. "Anecdotes Containing Wisdom". Contents include Han Xin's oil distribution, birds returning to their nests, Kangxi's adventures during his southern tour, the revelation of the crow drinking water, clever construction, making money, Han Xin's selection of troops, no rules, no order, Emperor Qianlong's banquet, Tang poetry egg banquet, wall calculations, floor brocade for multiplication, wheat grains on the chessboard, King Frederick's military parade, and clever couplets. 4. "Tracing the Origin to Know the Origin". Contents include the birth of integers, the origin of tangram, the origin of irrational numbers, dice and probability theory, and historical misunderstandings of Arabic numerals. 8. The story of "0", the wonderful circle, the numbers on the shoes, and how big the largest number is.