(Secretely, I want a SwissMicro dm42, but they're just too expensive. The fx-991ex is a very cool calculator and I'm keeping it to show off to family and friends, but I got myself a replacement fx-260 for everyday use. It retains the ease of use of the fx-83GT, but adds power and functionality that takes it literally to game-changing levels. And the whole menu system - who uses a calculator for spreadsheets or matrix calculations? Come on. A comprehensive set of advanced functions unique to CASIO scientific calculators Spreadsheet calculations. As a former Head of Mathematics, and a user of Casio calculators for over 40 years, I am confident that the fx-991EX is quite possibly the best classroom calculator they have ever produced. The display is pretty and I like how the entered formula remains on display together with the answer - but it's cumbersome: expressions used in everyday math and science require more clicks than with the "immediate entry" method. But more importantly, (5) I find that I don't like its main attraction, the V.P.A.M. The 16-digit four-line display makes it easy to see your calculations in full, the same way they would appear. This is the second edition of Casio’s advanced scientific calculator with a price and functionality that’s sure to satisfy students and professionals alike. First, my minor gripes: (1) It's too big I love the pocketable size of the fx-260 (2) the keys feel like chiclets and make a rattling sound when pressed (3) the mottled surface texture makes the alternate key labels hard to read, especially the blue ones - practically impossible except in very bright light - what were they thinking? (4) The slide-on cover is too loose-fitting, slips off by itself. A comprehensive set of advanced functions unique to CASIO scientific calculators Spreadsheet calculations Useful for learning statistics. Casio fx-115ESPLUS2 2nd Edition Scientific Calculator. One of the keys on my trusty old fx-260 had become erratic (it's over 20 years old, so I can't complain) and I decided to upgrade to the state-of-the-art fx-991ex.
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