![]() ![]() The processor inside has been upgraded in order to handle the higher res screen and one of the benefits of that are faster calculations. So when you are touching the screen you are directly touching the display panel unlike in the MS. While this is all well and good, it is not protected like the MS model. This enables better organization of menus and its also able to display equations and matrices and other stuff like integrals much better. Even Casio's direct competitors Sharp and TI don't have such screens on their current competing models. The natural textbook display screen which was introduced in the ES models gets an upgrade, It now utilizes a higher resolution 192×63 dot display and can now support more lines of text.This is clearly the best feature of the EX. The shroud is completely blank in the EX. One thing I would like to add is that they have removed the text in the shroud which contained the list of constants and the conversion table. Their placement is also slightly different to ES and the MS versions, but the main setting is the same, so you will find yourself at home. The touch feel of the material is also slightly different, it somehow feels slightly better to touch and operate. They are now square much like the W and TL models so they don't wiggle around in the case as much as they used to like in the ES versions. For this review, I'll compare the earlier versions FX 991 W, FX-991 MS, FX 991 ES and the FX 991 ES Plus, with the FX 991 EX, and list my experiences below: įrom the moment you pick the calculator up, the first thing you will notice is that the buttons are slightly different than the current models. I have used models from all the scientific calculator lineups which Casio released in the last two decades. I hope it gives you an informed view of this calculator. This is going to be quite a long review, so sit back and read it patiently. This is my review of Casio's newest solar powered scientific calculator for students which was released after the FX 991 ES Plus.
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