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Casio fx 991de scientific calculator
casio fx 991de scientific calculator
Casio fx 991de scientific calculator
Casio fx 991de plus scientific school calculator casio fx 991de plus the casio fx 991de plus is an easy to use technical and scientific calculator with a large range of functions the natural display lets you enter and display fractions square roots and other numeric expressions in the same way as they appear in your textbook the calculator is powered by a via solar cell and a back up battery casio fx 991de scientific calculator

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