Skip to content
RBJLabs ®

Casio FX-991 EX Calculator

The Casio FX-991 EX Calculator is the favorite choice of any high school or college student. Its design, its screen and the large number of functions it has, make it the best value for money calculator on the market in this 2021.

Buy Casio FX-991EX

Technical characteristics of the Casio FX-991 EX

  • Intuitive icon display
  • 552 functions
  • Solar energy when there is Sun and battery when sunlight is insufficient
  • Presentation of symbols as they appear in books
  • High computational competence to perform advanced mathematical operations
  • Calculations with spreadsheets
  • Matrix calculations
  • Statistical distribution calculations
  • Metric conversion
  • Scientific constants
  • Engineering symbols
  • Statistics lists
  • Online viewing service via QR code

Casio FX-991 EX calculator best deals

Casio-FX-991-EX-Calculator – High resolution screen to view more data as spreadsheets
– Simultaneous and polynomial solver
– Integration and differentiation
– 552 functions
– Natural textbook display: symbols and numbers appear just as they do in the textbook


Advantages over other calculators

In itself this calculator is very complete, but it is important that we know well the advantages it offers us.

  • Excellent price: even if there is a wide variety of calculators on the market, without a doubt, the Casio FX-991EX is the best option to help us in school studies, it helps high school and university students on a large scale.
  • Durability: the quality of Casio calculators are to last a lifetime, once you purchase your FX-991 EX you will realize the excellence of the materials with which it is made. We have been with the calculator for more than 5 years and it works wonders.
  • Intuitive: although it has a large number of functions, it is enough to learn to use the ones that we will commonly apply to have an incredible user experience.
  • Calculation speed: Unlike other calculators, we have found that the Casio FX 991 EX added more processing power, which will make you get the result much faster on complicated integrals than another calculator of the same price.
  • Aesthetics and usability: it is recognized that the calculator is very beautiful, the finish of its buttons is totally different. In addition, it has imitation carbon fiber finishes that make the calculator look like a real gem. One falls in love at the first contact.

Before buying the Casio FX-991 EX

I want to emphasize that this calculator facilitates on a large scale the calculations carried out at school, but that does not mean that we no longer carry out operations in the classic way with pencil and paper.

Like any object we buy, as long as we take care of it, it will last us forever, since the calculator itself is very resistant and we have it almost like new despite several falls that it has taken, it has some scratches but in operation it is excellent.

Casio FX-991 EX calculator final conclusion

It is perfect because when we have to do an operation with matrices, the calculator does it; that if we have to calculate the inverse of a matrix, the calculator gives you the inverse. Just imagine the power of this calculator. Sure, it can only up to max 4×4 matrices, but it’s already a great help.

We also know that in school we go through a lot of calculations of the values of the systems of equations, where you have to apply Gauss or some similar method to find the unknowns. Well, this calculator also does all that procedure to find the unknowns.

If you have a third degree equation and you need to find the roots of that equation, the calculator also has that power to give you the values of the roots of that equation.

Without a doubt one falls in love with the Casio FX-991 EX.

Casio-FX-991-EX-CalculatorBUY THE CASIO FX-991 EX