Sums. They’re Math Magic Derrick Willer MBE 
Includes a £4 donation to Memusi Electric 


“An amazing book for explaining mathematical concepts in an engaging manner.” Dalia, 14, UK “I liked the random format  that helped it to feel like a book, not a textbook.”, Archie, 14 ,UK “A lovely book that introduces complex maths topics to children in a refreshing and interesting way.” Helen, teacher UK “My favourite part of the book was the history of multiplication, it was very fascinating.” Emily, 15, UK “The format kept me interested in reading the book throughout and the contents helped me better understand certain aspects of algebra”, Oliver 14, Canada “Invaluable in a home school environment”, Bob, teacher, UK “I found the book incredibly fun to work through.”, Stephanie, 15, UK “It is a very enjoyable book for all and I would recommend to all my friends.”, Sarah, 14, UK “I have been able to accumulate useful information such as being able to use algebra,” Imaan, 15, UK “A really interesting book that teaches lots of different maths concepts while having fun with the subject.”, Jo, Teacher, UK “My favourite part was the easytounderstand magic tricks which also explained the maths behind them.” Rhea, 15, UK 





Contents 

Sum Geometry 
Letter Sums 

Sum Problems To Solve 
Sum Probability 
More Geometric Sums 

Where Did Numbers Come From 
Sum Indices 
More Funny Sums 
Sum More Card Tricks 

Handy Multiplication 
More Geometry 
Sum More Science 

Where Did Money Come From 
Sum More Logic 
Sum Christmas 

Sum Science 
Sum Logic 
Sum Interesting Sums 
Sum Calculus 


References and Acknowledgements 

