There are so many fun things you can do with matchsticks...
This book contains 300 matchstick puzzles featuring Arabic and Roman numbers and that will get your brain in gear.
You are presented with an incorrect mathematical equation made using matchsticks, and you must move, remove or add 1 or more matches to turn it into a valid equation.
This book features operations with Arabic numbers:
addition and subtraction with 1,2-digit numbers by 1,2-digit numbers
multiplication and division with 1,2,3-digit numbers by 1-digit numbers
There also are variations with Roman numerals.
The answers can be found at the end of the book.