CalcuDoku 9x9 - Hard - Volume 10 - 276 Puzzles by Nick Snels (English) Paperback
24,29 €
CalcuDoku is a fun way for kids and adults to practice addition, subtraction, multiplication, and division facts. This book is ideal for you if you love to solve difficult CalcuDoku 9x9 puzzles. You do not need to wade through tons of easy CalcuDoku puzzles before getting to the real brain teasers.
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