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Casio - fx-250D - - Scientific calculator - Casio fx250D - Casio.ledudu.com - Casio pocket computer, calculator, game and watch library. - RETRO CALCULATOR FX PB SF LC SL HP FA
3.- Análisis-Estudio de una calculadora II. (Calculadoras CASIO, modelos fx- 250D, fx-570s y fx-570MS.) EL TECLADO EJERCICIOS A
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