Citiplus Standard Scientific Calculators with 417 functions and Natural textbook display format!! Citiplus's original "Natural Expression Input Display" and "Natural Expression Output Display" make it possible to display fractions, exponents, logarithms, powers, and square roots just as they are written in the textbook. The result is enhanced student comprehension and improved math class efficiency.
Citiplus FX-991ES PLUS has a matrix display and solving equations has never been easier as this is one of the new functions. Another is random Integers where you specify the range of random integers you want to generate and the FX991ESPLUS will display them.
The FX991ESPLUS has many functions that can be used to solve many problems. It is ECO friendly and you are safe to take it into an exam without it failing not to work. Other opinions of the product are that they think that it is one to the best calculators that you can buy.