The Pocket Calculator Race
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A Brief History of Calculators in the Classroom
ABR
The Pocket Calculator Race
A history in calculators
Farewell, Pocket Calculator? - The New York Times
File:Vintage Craig Electronic Pocket Calculator, Model 4501, Made by Bowmar for Craig (Bowmar Model 901B), Made in the USA, New Price Was 239.95 USD, Circa 1971 (12092485315).jpg - Wikimedia Commons
The Rocky Road to the Curta Pocket Calculator – Hand-Eye Supply
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Remember Your First Pocket Calculator?
I can't find S to D button I couldn't find the fraction button at first but I found it eventually so I dont know if it's a diffrrent symbol or its just
Scientific Calculator - Texas Instruments TI-30X IIS
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por adulto (o preço varia de acordo com o tamanho do grupo)
