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Utilizaron el abaco, para contar y realizar cuentas.
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El Científico francés Blaise Pascal inventa, La Pascalina sumaba y restaba, y lo hacia con lentitud.
Plan projects on a visual timeline
Map milestones, phases, deadlines, and key events in one place so the sequence is easier to see and share. Timetoast is a timeline maker for work, school, research, and stories.