Title: Funny and challenging
Review: This book presents a very clear exposition of other bases through the device of a spaceman travelling to worlds whose inhabitants have a different number of fingers from us. The traveler has to work through his number confusion to get needed supplies for his spaceship and return to earth. The story line is intriguing and humorous, and the exposition of number bases is clear and extensive, even going into converting base 8 to base 2 and providing practice in base 2 long division. My son loved it and could follow the early chapters even in early elementary school.This book could provide a great supplement in school, but it also provides an option for parents of kids who need more challenge in math. You can use this book with your child at home without tripping too much over the school curriculum. It is enrichment that will really solidify your child's understanding of the base 10 system through the exploration of alien math!
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