The Casio FX 991 ES Plus plis an advanced scientific calculator designed for different levels of math and scientific studies. Equipped with advanced features for graphing and calculus problems, it quickly provides accurate solutions to math equations. Its lightweight design and blue color make it an attractive and practical choice for school and home studies alike. The use of icons on the menu screen improves viewability. Selection of the desired function is quick and easy. Variables and statistical calculation results stored in memory can be displayed in lists. There’s no need to recall and confirm individual values as with previous models