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Mountain of the Knowledge Master
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Dr. Inventor's House
Fun Park
Glossary
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Mountain of the Knowledge Master
Chapter 1 B.C.: Before Calculators
Chapter 2 The World's First Calculator Only Did Addition?!
Chapter 3 The First Electric-Powered Calculator
Chapter 4 Electric Calculators for All
Chapter 5 The Desktop Calculator
Question Mark Tower
Dr.Inventor's House
Fun Park
Glossary
For Teachers and Parents
Sitemap
 
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