Why does the German version of the Casio fx-991EX, the fx-991DE X, have more functions than the US version?
Right now I have an fx-115ES Plus, and I was hoping to upgrade to the prettier and faster CLASSWIZ (fx-991EX). However, it seemed to be missing some functions compared to the older fx-115ES PLUS and also the German version of the fx-991EX (fx-991DEX) such as the ability to do a product in capital pi notation.
Here's the US version of the fx-991EX. (Source: Casio)
Here's the German version, the fx-991DEX. (Smaller Casio source)
If you look at all three calculators side-by-side, it's easy to see many of the functions missing from the US version compared not only to the German version, but also to the older fx-115ES Plus.
To confirm this, Casio's technical specs sheet for the fx-115EX states that it has but 552 functions, while Casio's list of specs on the product page for the fx-115DEX shows that it has 696 functions.
That's a HUGE difference in functionality! The US version has 144 fewer functions than the German version. That's like taking the German version and chopping off just over one fifth of its functionality for the US.
It looks like there's a similar disparity between the Chinese and Japanese versions of the calculator.
It makes no sense that Casio would do this to the US version, especially since an older US Casio calculator, the fx-115ES Plus, has much of the very basic functionality that's lacking in the newer ClassWiz scientific calculator.
Do any of you know if there are plans to fix this issue or why the issue exists in the first place? Also, is it possible to work around the issue by getting the German ClassWiz and changing the language to English?
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.
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Easy-to-understand English messages and interactive format
Nearly all English words are displayed on the screen in unabbreviated form. Interactive menu display realizes more intuitive operation.
High computational competence for performing even advanced mathematics
ClassWiz contains calculation functions that support even advanced mathematical operations, including spreadsheet calculations, 4 × 4 matrix calculations, calculation of simultaneous equations with four unknowns and quartic equations, and advanced statistical distribution calculations.
Online Visualization Service Using QR Code
Generate QR codes of equations input into the calculator by a simple operation. Graphs and other graphics can be displayed on smartphone or tablet screens.
A comprehensive set of advanced functions unique to CASIO scientific calculators
The New Classroom Standard
With High-resolution LCD Technology
ClassWiz has intuitive operability and high performance functions, so ideal for education.
Presentation
Introduces the excellent features of the new ClassWiz
Function
Introduces high-performance functions effective for advanced mathematics
1 Easy and Intuitive operability
Intuitive and interactive operation makes it easy to use the features of ClassWiz.
By the use of icons, selection of the desired function is quick and easy.
Visual, interactive and textbook-based displays make operation easier for teaching the use of scientific calculators, so you can concentrate on teaching mathematics.
Interactive format
Interactive menu display realizes more intuitive operation.
Natural Textbook Display Models
Input and display fractions, powers, logarithms, roots, and other mathematical formulas and symbols just as they appear in textbooks.
ClassWiz Series
Example
Ready to die zip. Solve the simultaneous equations.
{x + 2y = 32x +3y = 4The solution is
x = -1
y = 2
ClassWiz Series
Select equation
Solution
MS Series
Select equation
Solution
2 Essential functions for learning all in one
A wide range of essential functions are effective for education and available to support student's learning.
Spreadsheet
Useful for learning statistics.
Up to 5 columns x 45 rows
(maximum of 170 data items)
1Essential functions
Even advanced mathematical calculations are simple to perform and functions that take advantage of previous unavailable display capabilities are now possible.
Spreadsheet calculations
Statistics
The spreadsheet function can be used for studying statistics which has become important in mathematics classes.
Statistical calculation such as the mean of the data is executed
Recursion
In addition, the spreadsheet function makes it possible to enter recursive formulas.
Sequence: a1=2 and an+1 -2an-3 (n=1, 2, 3 ..)
a1-2, a2=1, a3=-1, a4=-5, a5=-13
Riemann Integral
Calculation using advanced Riemann functions is also possible.
The spreadsheet function makes it easy to use real-world data even in the classroom, enabling students to effectively study statistical processing.
2Variety of functions available to support student's learning.
From basic level to advanced math level for secondary and tertiary education.
Equation
Integration
Example
Solve the matrix calculation.
ClassWiz Series
Able to have the answer in 1 display as textbook form
MS series
Need 4 displays to enter numbers in Matrix B
Need 4 displays to check the final answer
3 Simple and quick calculations
Simple key strokes and visualized formulas make calculations faster.
Fast calculation for smooth performance in class or during examinations.
Example
Calculate the mean height of 5 students.
< Students’ height >
176cm, 180cm, 173cm, 180cm, 175cm
ClassWiz series 2 steps
Fewer keystrokes and faster !!
Standard variation, variance, mean, sum all in one display!
No more jotting down each solution on paper, ClassWiz will save your time.
ES PLUS Series 6 steps
ES PLUS Series 6 steps
ES PLUS Series 6 steps
4 Extensive and advanced service using QR Code
Generate QR Codes of equations input into the calculator by a simple operation.
Graphs and other information can be displayed on smartphone or tablet screens.
Advanced mathematical capabilities make teaching mathematics more extensive and advanced.
1Visualization with graphs
- STEP 1
- Input formula
- STEP 2
- Table
- STEP 3
- QR Code
Casio Fx 991 Ex Manual
- STEP 4
- Display Graph
Makes formulas visually understandable
2Online Sharing
Online sharing system assists active learning in your classroom.
If you use the QR Code Function, you can share students' results.
It will be a great help for group-work lessons.
Group B
QR Code
Graph
Group discussion
Combine and compare graphs on a single screen.
Combine Group A, Group B
3Quick user manual call-up
- STEP 1
- Display the menu
How To Use Casio Fx 991ex
- STEP 2
- QR Code
- STEP 3
- Display the manual
Makes learning to operate the calculator fast and easy
Please see the website in detail
- QR code portal site
- http://wes.casio.com
School
Hume tumse pyar kitna instrumental. Math and Science Division Chair at Lyons Township High School
LaGrange Illinois (USA)
Casio Fx-991es Plus Functions
Name
Ismael Zamora
Comment
I love the simplicity of the Casio fx-991EX (ClassWiz). The use of a natural textbook display and high resolution screen allows me to present mathematics the way students see mathematics in their textbooks. The ClassWiz also allows me to teach concepts I never could before. Statistics, data analysis, probability and spreadsheets are all now within the realm of possibility. My favorite feature is the QR Code generator. I now have the power of a graphing calculator in the hands of every student. The ClassWiz allows me to focus on the learning and not the button pushing.