![Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version? : r/calculators Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version? : r/calculators](http://i.imgur.com/k8SRsTj.jpg)
Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version? : r/calculators
What is the difference between the Casio FX‑991ES and 991ex? Which one should I prefer for my VTU exams? - Quora
![Amazon.com : CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products Amazon.com : CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products](https://m.media-amazon.com/images/I/71GoC0gsahL._AC_SL1500_.jpg)
Amazon.com : CASIO FX-991EX Advanced Engineering/Scientific Calculator (UK Version), Black : Office Products
![Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version? : r/calculators Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version? : r/calculators](http://i.imgur.com/TfdeQ3S.jpg)
Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version? : r/calculators
![Amazon.com: Casio FX-991DE X Scientific Calculator with Natural Display (only German Language) : Industrial & Scientific Amazon.com: Casio FX-991DE X Scientific Calculator with Natural Display (only German Language) : Industrial & Scientific](https://m.media-amazon.com/images/I/7198lV+ot9L._AC_SY679_.jpg)
Amazon.com: Casio FX-991DE X Scientific Calculator with Natural Display (only German Language) : Industrial & Scientific
![UP ACES on Twitter: "Only PRC-approved scientific calculators and Casio fx-991es are allowed to be used in the National Civil Engineering Quiz 2018. Casio Classwiz fx-991 EX is NOT allowed. #NCES2018 #BuildForTheNation UP ACES on Twitter: "Only PRC-approved scientific calculators and Casio fx-991es are allowed to be used in the National Civil Engineering Quiz 2018. Casio Classwiz fx-991 EX is NOT allowed. #NCES2018 #BuildForTheNation](https://pbs.twimg.com/media/DmVDOukU8AAYAjy.jpg:large)