![]() ![]() There is a German version known as the FX-991DEX that is available from Europe. For everyone else, I highly recommend this calculator for it's ease of use and sheer functionality.Īlso of note to those considering this model: The calculator doesn't have RPN (Reverse Polish Notation), so if that is something that is important to you, condsider buying an HP instead. While this is not a CAS (Computer Algebraic System) calculator, it is very capable of solving simu ltaneous equations, working with complex numbers, and handling matrix and vector math.Ĭompared to the FX-115ES that I had before, the FX-991EX is several times faster, so they have upgraded the processor on this one, yet it is still able to run off solar power when needed. Each mode (matrix, vector, statistics, etc.) has its own contextual features which are found in a menu displayed with the options button (OPTN).Įquations can be entered just like you would in a textbook, including integrals, derivatives, summations, proper and improper fractions, and more. The most used functions are the most accessible with a single button press, followed by slightly lesser used functions using the SHIFT key. If you've used the FX-300 / FX-115 ES or ES+ models before, you should feel right at home. I've owned quite a few different calculators over the years and have found that the Casio models in particular are very easy to use. Intuitive interface, crisp display, and solar powered too! :-) The best non-graphing calculator I've seen yet.
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