Casio Fx 991es Plus Scientific Calculator Zilver

I had to buy this for calculator for university and I think it is not as good as my old one. The buttons are really clicky and often does not have the function that I need.

Product is very versatile with many functions required for calculus and trigonometry.

I bought one for me a while ago casio fx 991es plus for around 50$. This one is better for a much lower price . The buttons work perfectly and it has a lot of options in it which is great. The screen is also really bright and lisible. I totally recommend it.

If you need a capable calculator that could be used in Math contests, this is the one to go for. The very useful prime factorization function is simply unique. There are certainly more powerful programmable calculators out there but if you are not planning to cheat and bring those into contests then this is the best -- and inexpensive too.

I teach grade 12 physics and math, and this is the calculator I recommend to all my students. It has unit conversions, statistics functions, and scientific constants. It also has a great natural display for those students who are algebraically challenged.