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BRANDNEW] ORIGINAL CASIO FX-991EX CALCULATOR COMPLETE WITH BOX AND MANUAL, Mobile Phones & Gadgets, Mobile & Gadget Accessories, Cases & Sleeves on Carousell
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Casio fx-991ES PLUS 2 Scientific Calculator with 417 Functions and Display, Natural : Amazon.de: Stationery & Office Supplies
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International Chemistry Olympiad - IChO - For the competition purposes, all the competitors will be given a calculator Casio fx-991EX. The manual for the calculator can be downloaded from the following link:
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Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version? : r/calculators
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