Casio FX-991EX Engineering/Scientific Calculator, Black, 3" x 6.5" x 0.4"
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Sharp EL-531TGBBW 12-Digit Scientific/Engineering Calculator with Protective Hard Cover, Battery and Solar Hybrid Powered LCD Display, Great for Students and Professionals, Black,Black and White
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Casio fx-991ES Plus 2 Scientific Calculator with 417 Functions and Display, Natural
DE HEXADECIMAL A DECIMAL (con CASIO Classwiz fx-991LA X) - YouTube
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Las cinco mejores calculadoras científicas para hacer todo tipo de operaciones