The Casio fx-991EX is a scientific calculator with 10 digits precision and formula input logic. It has 552 functions, 60 keys, and an LCD (liquid crystal) display. The power source is Solar + LR44 cell. The calculator was manufactured in China.
Facts at a glance:
Casio fx-991EX (ClassWiz) The Casio fx-991EX is a scientific calculator with 10 digits precision and formula input logic. It has 552 functions, 60 keys, and an LCD (liquid crystal) display. The power source is Solar + LR44 cell. The calculator was manufactured in China. Facts at a glance. Casio fx-570AR X User Manual 44 pages Summary of Contents for Casio ClassWiz fx-991EX Page 1 The symbols printed on the keys use Natural Textbook Display™ notation, similar to that found in.
- For the complete manual from Casio see this page, note the calculator is listed under fx-570EX / fx-911EX on the Casio manuals page. From The Calculator Guide on YouTube see this playlist on the Casio Classwiz fx-991EX. For example see this introductory video on using Statistics mode to find the mean, variance and other statistical summary data.
- Casio FX 115ES Plus and FX 991EX Design and Display. Putting the Casio FX 115ES Plus and FX 991EX side by side you can instantly tell what has been improved in the newer model and we can say that this one indeed has a better screen quality, the display looks crisp and overall easy to look at but, what makes you still considering the former.
| Feature | Value |
|---|---|
| Type | Scientific |
| Functions | 552 |
| Keys | 60 |
| Precision | 10 |
| Logic | Formula |
| Display type | LCD |
| Display size | 192 |
| Length | 165mm |
| Width | 77mm |
| Thickness | 11mm |
| Weight | 90g |
| Power Source | Solar + LR44 cell |
| Country | China |
| Original price | $30 |
| Year introduced | 2015 |
| Current price | amazon.com |
User Manual
You can download the Casio fx-991EX manual from the manuals website. If this doesn't work, you can also try this alternative download link.
Diagnostics
Note that diagnostic tests generally delete any data on the calculator. Be sure to back up any important information held in the calculator before running these tests.
While holding down Shift and 7 keys, press ON (displays DIAGNOSTIC), release keys, then 6. Then choose from menu.
Replacements:
If you have a Casio fx-991EX that is no longer working, it's probably easiest to just buy a new one, as this model is still currently available.
See other calculators by Casio
To change the language setting from Arabic to English(PDF/50.3KB)
The use of icons on the menu screen improves viewability. Selection of the desired function is quick and easy.
Natural Textbook Display
Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks.
List display function for thorough, speedy learning
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.
Easy-to-understand Arabic and English messages and interactive format
Fx 115es Training Guide
Nearly all Arabic and English words are displayed on the screen in unabbreviated form. Interactive menu display realizes more intuitive operation.
A comprehensive set of advanced functions unique to CASIO scientific calculators
Casio Fx-991ex Classwiz Manual Pdf