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  Spanish: Matemáticas - Historia de la computadora (elementaria/secundaria)
Spanish: Matemáticas - Historia de la computadora (elementaria/secundaria) - preview 1
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Unidad sobre la historia de la computadora en 4 secciones con preguntas de comprensión para cada sección. Unit on the history of the computer in 4 sections with comprehension questions for each section.
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