fx-991CW– Advanced Scientific Calculator with High-Res 4-Tone Display | Natural Textbook Display | 540+ Functions, Numeric Calculus, Matrix Solver | Ideal for Engineering, Science & Exams

The Casio fx-991CW is an excellent calculator with very good performance and a wide range of useful features. It is easy to use, fast, and well designed, making it perfect for students and professionals who need reliable calculations. The display is clear and the overall build quality feels solid and durable. I also want to highlight that the Amazon delivery time was reasonable, especially considering that this was an international transaction. The product arrived well packaged and in perfect condition. Overall, I am very satisfied with this purchase and would definitely recommend this calculator.

These calculators are excellent. my wife and I are engineering students and decided to try them. they are excellent for classes and exams, with so many functions, like vectors, equations, inequations... so we totally recommend them. They are very easy to learn how to use. and they offer great value for the price.

Great calculator. I teach math and this is one of two non-graphing calculators I recommend. Intuitive controls and packed with a crazy amount of features that my students don't need. The build quality is fine but the buttons don't feel quite as nice as the TI competition - but I have never seen one of these fail. So it's more perception than reality. Also, I have an affinity for Casios as they were the brand of calculator wristwatch young nerdy me used to wear!

I bouught this for College Chemistry for Health Professions as a back-up to the first one (same exact one) I just bought within the past week. I LOVE this so much! It has so many functions and is so lightweight. Someone said the weight makes it feel cheap, but it is definitely NOT a cheap type of calculator. You would also think that it's "cheap", due to the low price, but this is the best scientific calculator I've ever had (and I've bought those TI ones in the past that were almost $100).

Has everything a student needs, build quality is great

This Casio fx-991CW is packed with features and handles complex calculations with ease. The high-resolution display is clear and makes equations easy to read, especially for matrices, calculus, and advanced functions. The menu system is well organized once you get used to it, and it’s approved for exams, which is a big plus. It may take a little time to learn all the functions, but it’s extremely reliable. A great choice for students in science or engineering.

Just what i needed as an engineering undergraduate, the functions are just what i needed and I havent even scratched the surface of all that it can do, the interface looks nice and this is overall a great calc for the price you pay.

I received this calculator in perfect condition, and after using it for several months in a very demanding master’s program, I can say it works flawlessly. It’s reliable, fast, and hasn’t given me any problems at all. For anyone who needs a solid calculator for advanced studies, this one does its job extremely well.

really good features, wonderful solver

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Ótima calculadora científica, de qualidade. Esta versão sem o LA (creio que seja de Latin America), não possui idioma português, somente inglês. Comprei já sabendo disso e pra mim, tudo tranquilo.

Best calculator i ever used it does need time to learn but honestly didn’t deter me from loving it