Quick Review: Casio fx-9910CW 2nd Edition

Quick Review: Casio fx-9910CW 2^nd Edition

The Casio fx-9910CW 2^nd Edition is an update of the fx-991CW first released in 2023.

Product Pages

United States:

https://www.casio.com/us/scientific-calculators/product.FX-9910CW/

The fx-9910CW has two keyboards: black with gold font and pink with purple font (limited). I have one each and Casio has improved on the readability on the pink edition with the dark purple font.

I’m sure this model will be available world wide soon.

What’s the Same and What’s Different

Overall, the fx-9910CW 2^nd Edition has the same mathematical features as the fx-991CW. The modes included are:

Calculate: the main app for mathematical calculations

Statistics: 1 and 2 variable with seven regression models:

Linear:  y=a+bx

Quadratic: y=a+bx+cx^2

Logarithmic:  y=a+b*ln(x)

Exponential:  y=a*e^(bx)

Power I:  y=a*b^x

Power II: y=a*x^b

Inverse:  y=a+b/x

Statistical graphs may be generated with the QR feature.

Distribution: Binomial, Normal, and Poisson distributions, along with their inverses. The functions work with lower-tail probabilities (-∞ or 0 to x).

Spreadsheet: 5 columns, 45 rows. 2,380 byte memory.

Table: Generate a table for up to two functions f(x) and g(x). Generate graphs with the QR feature.

Equations: Linear systems (up to 4 x 4), polynomials up to 4^th order, and a general equation solver.

Inequalities: Solve inequalities for polynomials up to the 4^th order.

Complex Numbers: Complex number arithmetic with polar/rectangular conversion, integer powers, real/imaginary parts, conjugate

Base N: Base mode for the traditional decimal, hexadecimal, octal, and binary basis. Binary integers are up to 31 bytes with one sign bit.

Matrix: Four matrices, up to size 4 x 4, with basic matrix functions such as determinant, transpose, and inverse.

Vector: Four vectors, 2D or 3D, with dot product, cross product, and norm.

Math Box: Dice Roll and Coin Toss simulations

47 scientific constants (SI units) and unit conversions

We still have the newer Casio style of navigation keys, the Home Key, the Back Key, the Settings key, and the Scroll up and down keys.

What is different?

First, the fx-9910CW is not solar powered, but instead runs on a single AAA battery.

Welcome changes:

The menus all have short cut keys! This eliminates the requirement to scroll down menus, which some get long, to find the sub menus and functions. This makes the operating the calculator a lot easier and more efficient, eliminating additional key strokes by repeatedly pressing the arrow keys.

For example, to get the absolute value in Calculate mode, press [ CATALOG ], [ 3 ] for Numeric Calc, [ 1 ] for Absolute Value.

In the same mode, we call up the Speed of Light constant (c), press [ CATALOG ] , [ 7 ] for Sci Constants, [ 1 ] for Universal, and [ 3 ] for c.

There is a setting to turn the hide the shortcut numbers but thankfully it won’t turn off the ability to navigate by using short cut keys.

The 10^[] and FORMAT keys return to familiar form! Like the fx-CG 100, we have an option on how the 10^[] and FORMAT keys operate.

10^[] Key:

(1) Power: Acts like a power key like the fx-991CW. I read that there are potential problems with calculating with this key leaving calculations to return unexpected answers.

(2) Sci. Notat: This returns this key to the traditional scientific notation key. When this option is selected, the 10^ is shown in a small font. This key now acts like the [ EE ] or [ EXP ] keys on other scientific calculators. This is the default setting.

FORMAT Key:

(1) -π√ ←→ Decimal. Pressing the FORMAT key just toggles between decimal and the exact (when available) format of answers. This brings back the beloved [ S←→D ] key. This is the default settings.

(2) Format Menu. This is the format menu that is presented, similar to the fx-991CW. We trade off the quick toggle for additional formatting options.

Shortcut Catalog. Pressing [ SHIFT ] [ CATALOG ] is a new feature and provides a listing of all mathematical functions available in the active mode. Up to 15 functions are shown, using the arithmetic keys (+, -, ×, ÷) and the decimal point (.) as additional shortcut keys. The shortcut catalog does not have the conversions or constants.

These changes are welcome and enhance the operating experience of the calculator.

My next wish is that the fx-9910CW included the Algo mode (algorithm mode) that allowed small programs (via a mix of Scratch and Casio Basic). You can find out more details here:

https://edspi31415.blogspot.com/2025/08/casio-fx-92-college-plotting-lines.html

I just think the algorithm mode is neat, gives students an introduction to programming, and would have fit the fx-9910CW well.

Great job, Casio. I think Casio listened to calculator users and brought back these improvements, and brought it more in line with operating the fx-CG 100/Graph Math Plus. If you were hesitant about the fx-991CW, the fx-9910CW 2^nd Edition is a good time to jump in.

Eddie

All original content copyright, © 2011-2025. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.

Spotlight: NEWYES GY991 MS

 Spotlight: NEWYES GY991 MS

This is going to be a quick spotlight on the NEWYES GY-991 MS, a clone of the Casio fx-991 MS made in China.

Features

Model: GY-991 MS

Company: NewYes

Modeled after: Casio fx-991 MS

Number of Functions: 401

Display: Two Lines

Battery: Solar, with backup battery L1154F (equivalent LR44)

Price: circa $11 - $12

The GY-991 MS is a two line scientific calculator with many functions including:

* numerical integration

* numerical derivative

* complex arithmetic (R<>I indicator, with ⅈ and ∠ to indicate imaginary and angle parts)

* 40 scientific calculators (circa 2008 values)

* 40 U.S./International unit conversions

* Polar to Rectangular conversion (x stored in E, y stored in F)

* Rectangular to Polar conversion (r stored in E, θ stored in F)

The display has two lines: the top is the calculation while the bottom line is the result. The calculator is algebraic, so you can type expressions as they are written.

The GY-991MS is similar to the Casio fx-991 MS in functionality.

Modes (by repeated presses of the [ MODE ] key):

COMP: Regular

CMPLX: Complex Mode

SD: One-variable statistics

REG: Two-variable statistics

BASE: base conversions and Boolean logic. The four bases available are decimal, binary, octal, and hexadecimal. The Boolean logic functions (and, or, xor, xnor, not, neg, with suffixes) are accessed through the repeated presses of the [ x^-1 ] button.

EQN:

Unknowns: 2 or 3: Simultaneous linear equations of 2 or 3 variables

Degree: 2 or 3: Quadratic or cubic polynomial solver

MAT: Matrix mode, 3 matrices (A, B, C) up to 3 x 3. Operations available: Det (determinant), Trn (transpose), Inverse through the [ x^-1 ]

VCT: Vector mode, 3 vectors (A, B, C), 2D or 3D. Operations available: dot product (through the VCT menu), cross product ([ × ] key), norm ([SHIFT] [ ) ] (Abs))

Angle modes: Deg, Rad, Gra (degrees, radians, gradients)

Display modes: Fix, Sci, Norm

Disp mode: Engineering mode on and off, fraction display, dot/comma decimal separator

Six regression models are available: linear, logarithmic, exponential, power, inverse, quadratic

The keys are plastic, but feel serviceable and responsive. The calculations are comparable. If you are not planning to take classes or take a high-stakes certification exam, it may be an off-brand model to try. It is also a good, inexpensive calculator to use.

Eddie

All original content copyright, © 2011-2024. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.

Spotlight: Sharp EL-5200

 Spotlight: Sharp EL-5200

As we come on the 13^th (April 16) anniversary of this blog, I want to thank you. Blogging about mathematics and calculators is a joy in my life and I’m grateful for your support.

Today’s spotlight is about an early graphing calculator, which is a rare collector’s item today: the Sharp EL-5200, also known as the Sharp EL-9000.

Quick Facts

Model: EL-5200/EL-9000

Company: Sharp

Timeline: 1986 – late 1980s

Type: Graphing, Programmable

Memory: 5,120 bytes

Power: 2 x CR2032 batteries

Keyboard

There are excellent reviews and articles on the Sharp EL-5200/EL-9000, please check out the Sources section below.

The EL-5200 is a folding calculator which is housed in a wallet. On the left side, we have the scientific keys, the arrow keys, memory keys, and the numeric keypad. The keys are the normal calculator keys.

On the right side, there are the alphabetic keys and the utility keys. I think the key style on the right side is a membrane keyboard, but I am not sure.

The Four Main Modes

The four main modes of the Sharp EL-5200 are, which are listed in switch order:

STAT mode

COMP mode

AER II mode

AER I mode

AER II and AER I modes are programming mode, which is called the Algebraic Expression Reserve mode. The AER I mode is the classic AER mode while AER II is the newer version of programming mode.

The manual to the EL-9000 can be downloaded here: http://basic.hopto.org/basic/manual/Sharp%20EL-9000%20EN.pdf

STAT Mode

This is the calculator's statistics mode. Upon switching to this mode, we have the option of storing data points. Data points are stored in array S while basic statistics are stored in array Z. The basic statistics stored in array Z are:

Z[1] = n

Z[2] = Σx

Z[3] = Σx^2

Z[4] = Σxy

Z[5] = Σy

Z[6] = Σy^2

Be aware when you decide to store data, it takes up programming memory.

Three keys are remapped as follows:

[ RM ]: CD. Clear data. Erases a data point.

[ ⇒M ] (x, y): Adds a comma between the x point and y point.

[ M+ ] DATA: Adds a data point.

The statistic variables are access through the second function ([2ndF]) of the numeric keypad and arithmetic keys.

Linear regression is offered in the form of y = a + bx. The variable a is the y-intercept while the variable b is the slope.

Adding × n before pressing [ M+ ] {DATA} adds the frequency to the data point.

Graphs of statistical data are available, including histograms, linear regression lines, and scatter plots.

Fairly simple.

COMP MODE

This is our calculation mode. In addition to our regular scientific calculator, which operates in algebraic mode, there are other sub-modes included in COMP Mode.

Graphing

We can graph up to two functions at one time. The [ RANGE ] key allows to set the range parameters, while the [ AUTO ] key sets the zoom level automatically. The [DRAW] key draws the graph.

For example, to draw y(x) = x^2 + 5 using automatic zoom, key in [ GRAPH ] [ X ] [ x^2 ] [ + ] 5 [ AUTO ] [ DRAW ].

The screen takes up the entire left hand of the screen. The screen shows one coordinate at a time, X or Y. Switch between the two with the key sequence [ 2ndF ] [ ↑ ] {X<>Y}.

Matrices

The EL-5200 can store up to 26 matrices A-Z. Operations include determinant, inverse, transpose, and matrix arithmetic. We can get to the arrays at any time by pressing [ 2ndF] [↓].

In fact, the [ 2ndF ] [ ↓ ] toggles between the text (calculator), graphics, and data/array screen.

The [ 2ndF ] [ A ] {DIM} sequence can set the dimensions of a matrix.

In the data screen, we see two elements at one time.

Base Conversions

Integers can be converted between four bases: hexadecimal, binary, decimal, and octal. (bases 16, 2, 10, and 8, respectively) Not much more than arithmetic is offered.

Running Programs

Finally, COMP mode is where we run AER programs. Scroll through the programs with the [ PRO ] button. Start programs and enter data at the prompts by using the [ COMP ] key.

AER I MODE

AER I mode is the classic programming mode for Sharp programming calculators. This mode is meant for simple calculations. The [ f()=/? ] key puts the input form     f( )=. Enter the variables in between the parenthesis, and the variables will automatically be prompted. For example f(AB)= prompts for the variable A, then B. Only global variables (A – Z) are used. Implied multiplication is allowed. This mode is similar to the AER mode of EL-5100 from 1979.

Example: Circular Radius and Circumference

Title:

CIR.1

Code:

M: f( R ) = π × R^2 ⇒ A, 2 × π × R ⇒ C

(spaces are added for readability)

AER II MODE

AER II is the full programming mode. In this mode, we can use both global and local variables, with local variables being the default. Local variables include lower case letters and subscript numbers. Subscript numbers are entered by the sequence [ 2ndF ] [ number key ]. In this mode, the [ f()=/? ] key adds a question mark to the variable and creates a prompt. Unlike AER I, implied multiplication is not allowed.

Example: Graphing a Sine Wave

Title:

Graph A×sin(Bx+C). Set radians mode.

Code:

M: A = ? B = ? C = ? GRAPH A × SIN (B × X + C) AUTO DRAW

(spaces are added for readability)

There is no Radians mode command, so the user has to set Radians mode during program execution.

Common to Both Program Modes

M: This is the main loop.

, (comma): Displays the result of a calculation and pauses the execution. Press [ COMP ] to continue.

␣ (open space) : Finishes a calculation without stopping.

◣ (right triangle): Ends the current program or subroutine.

↳ ↰ : Loop markers

(comparison) -Y→[(do if true)] -N→[(do if false)]: If Then Else Structure.

[ 2ndF ] {SUB}: Creates a new subroutine. Switch between subroutines and the main loop by pressing [ 2ndF ] [ ↑ ] or [ 2ndF ] [ ↓ ].

To create a new program, go to either AER I or AER II mode, press [ COMP ], enter the title. The title is not limited to eight characters. Since we do not have string or string functions, include descriptive information and reminders in the title (see the example in AEI II Mode above).

I find the symbols taking a bit getting used to because we have symbols instead of the regular If-Then-Else-End structure, For-Next loop, Lbl-Goto structure, etc. AER can store complex formulas and best are for simple number crunching.

Overall Thoughts

I like the separate alphabetic keys, but the membrane keyboard calls for extra care when using those keys. The number of features of the EL-5200 are very invented and advanced for 1986. I wish the AER programs had line returns instead everything smashed together in wrap around lines, but it is more for readability. The calculator has a nice, compact form and is fun to work with.

In the future I will be posting AER programs for the EL-5200. It’s rarity makes the EL-5200/EL-9000 collectible.

Sources

Calculator Culture. “Sharp EL-9000 Graphing Calculator from 1986” November 27, 2023.

https://www.youtube.com/watch?v=cw7Gp2Qrmtk

Gelhaus, Matthew & Taia Gelahus. “Sharp EL-5200” gelahus.net. Last Updated December 21, 2023. http://www.gelhaus.net/cgi-bin/page.py?loc:8bit/+content:EL-5200.html Retrieved March 1, 2024.

Magyarra, Váltás “History and Programming of AER Calculators”. Milestone in the History of Calculators. Virtual Museum of Calculators. 2016. Retrieved March 25, 2024. http://www.arithmomuseum.com/szamologep.php?id=25&lang=en

Sharp Corporation. Sharp Scientific Calculator Super Scientific Model EL-9000 Operation Manual. 1986 http://basic.hopto.org/basic/manual/Sharp%20EL-9000%20EN.pdf

(website hosted by hopto.org) (this the same manual for the EL-5200)

Eddie

All original content copyright, © 2011-2024. Edward Shore. Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited. This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.

Review: Casio fx-991CW (and the lack of multi-statements)

Review:  Casio fx-991CW (and the lack of multi-statements)

Quick Facts

Model:  fx-991CW

Company:  Casio

Years:  Internationally: 2022 - present, United States: April 2023 - present

Type:  Scientific

Power:  Solar with 1 LR44 backup battery

Display:  Multiline, 4-color gray display

Original Price:  $21.00 - $22.99 U.S. Dollars, varies on the specific version

Number of Variables:  9

Operating System: Algebraic

Update on the Classwiz

The fx-991CW is an update in Casio's Classwiz series, specifically on the 2015 fx-991EX Classwiz.  

Check out my review on the fx-991EX Classwiz from November 2015 here:

http://edspi31415.blogspot.com/2015/11/casio-fx-991ex-classwiz-review.html

The modes on the Classwiz are:

Calculate:  the main app for mathematical calculations

Statistics:  1 to 2 variable statistics.  Regressions include:

Linear:  y=a+bx

Quadratic: y=a+bx+cx^2

Logarithmic:  y=a+b*ln(x)

Exponential:  y=a*e^(bx)

Power I:  y=a*b^x

Power II: y=a*x^b

Inverse:  y=a+b/x

Distribution:  Calculations involving the binomial, normal, and Poisson.  The Inverse Normal deal with the lower tail (left) probability only.  

Spreadsheet:  Like the fx-991EX and Casio's current graphing calculators, the fx-991CW has a spreadsheet which has a 5 x 45 cell capacity.  The total memory is increased to 2,380 bytes (from 1,700 bytes on the fx-991EX).  Basic spreadsheet features included are:  labeling cells, sum, mean, minimum, maximum, absolute cell references ($), copy, cut, and paste.  

Table:   Generate a table of one function or two functions.   The functions are defined as f(x) and g(x).  With a QR code, you can generate a graph of these functions.

Equation:   Solve linear systems, up to 4 x 4 equations.  Solve polynomials, up to 4th order.  Real coefficients only but complex roots are calculated.   The general equation solver is moved to this mode.   

Inequality:  Solve inequalities up for polynomials of orders 2, 3, and 4.

Complex Number:  Complex number arithmetic with polar/rectangular conversion, integer powers, real/imaginary parts, conjugate

Base N:  Integer arithmetic with Boolean logic.  Instead of keys, the [FORMAT] key cycles through the four modes: Decimal, Hexadecimal, Binary, Octal.   Binary integers are up to 31 bytes with 1 sign bit.  We can not store or recall varaible values in this mode.

Matrix:  Works with four matrices up to 4 rows and 4 columns.  Functions include transpose, inverse, and determinant.

Vector:  Works with 4 vectors with either 2 or 3 elements.  Functions include dot product, norm, and cross product.

Ratio:  Solves common ratio problems.

Math Box:  This is the a new feature to the Classwiz.   For the United States, the Math Box has two simulations:  Dice Rolls and Coin Toss.   Depending on the country, the CW may include additional features.  

Emulator and Classpad.net

Purchasing a fx-991CW came with a emulator license with ClassPad.net.   The license number can be obtained using the Get Started option from the Settings menu.   Use the QR code.  For my calculator, the license for using ClassPad.net is seven years at no cost.  However, using an emulator without first purchasing an eligible calculator will require an additional cost.  

You can find details about Classpad.net here:  https://classpad.net/intl/features/

Keyboard, What is Added, and What is Subtracted

The keyboard of the fx-991CW is quite different from the previous Casio calculators.   The keys are now round with a lot less labels.   Most of functions are now stored in the catalog and tools.  Let's go over some of these keys:

[ house icon ]: [HOME].   This is where we switch the modes of the fx-991CW.   There are no numerical shortcuts, so we have to arrow and scroll to select the mode we want.  

[ three lines ]: [SETTINGS].  The settings key replaces the SETUP key sequence.   

Also note that the sub menus are selected by either pressing [ → ] or [ EXE ].  If there are radio buttons, select the option desired.  

[ curved arrow ]: [EXIT/EDIT].  This key, on the 2nd row, 2nd key from the left, will be used to exit menus and re-edit expressions.   

[ double up arrow ]/[ double down arrow ]:  This key, top right of the calculator, is used to quickly scroll through menus or lists.  Think of this key as the Page Up/Page Down key.

[ < >x] ]/[VARIABLE]:  This is the variable key.

Here is where we will store and edit values that are stored in each of the nine variables.   This key replaces the STORE key.     If we are operate in a mode that does not allow for editing or store values, there will be a lock icon with the selected variable.  

To store a result:

1.  Execute operation or recalling a calculated stat variable.

2.  Press [VARIABLE].

3.  Select variable, press [ OK ].

4.  Select Store, press [ OK ].

To edit a variable's value:

1.  Press [VARIABLE].

2.  Select variable, press [ OK ].

3.  Select Edit, press [ OK ].

4.  Enter the new value, press [ OK ].

To recall a variable in a calculation:

1.  Press [ SHIFT ].

2.  Press any of the following keys to get the variable:

[ 4 ]:  A

[ 5 ]:  B

[ 6 ]:  C

[ 1 ]:  D

[ 2 ]:  E

[ 3 ]:  F

[ 0 ]:  x

[ . ]:  y

[ x10^ ]:  z

There is no ALPHA key as it was in past Casio calculators.  

[ f(x) ]/[FUNCTION]:  

Here is where we can store and use up to two functions: f(x) and g(x).  The great news is that f(x) and g(x) are no longer limited to the Table, they can be used in other modes such as Calculate.   The equations f(x) and g(x) are retained while switching modes but not retained when the calculator either is turned off or the Input/Output setting is changed.  A missed opportunity for the latter.

A plus is that either f(x) or g(x) can be a composite function.  That is f(x) can contain g(x) or g(x) can contain f(x).  

There are two ways to access the x variable:  its own key [ x ] or the key sequence [ SHIFT ] [ 0 ].  

[book]/[CATALOG]:  This is where all the functions and commands can be accessed.  The menu order of the catalog changes depending on the mode used.  Some submenus include:

Function Analysis:  The calculus functions, that used to be on the keyboard, are now stored in the Function Analysis menu:  derivative, integral, summation, logarithm*, log*, ln* (* also on the keyboard)

Probability:   % (divides the number by 100), factorial, permutation, combination, random number, random integer

Numeric:  Absolute Value, Round Off (round the number to the Fix settings internally)

Angle/Coord/Sexa...:  angle units (degrees, radians, grads, degrees minutes seconds*), polar/rectangular conversions (* also on the keyboard)

Sci Constants:  47 scientific Constants

Unit Conversions

[ three circles ]/[ TOOLS ]:  The TOOLS menu changes dynamically based on the mode.   For example, the Calculate mode will have an Undo function.

[ FORMAT ]:  Instead of the [S<=>D] key, we have the [FORMAT] key, which asks how to change the value:  Standard, Decimal, Improper Fraction, Mixed Fraction,  ENG (Engineering) Notation, Sexagesimal (degrees-minutes-seconds).

In Base mode, the [ FORMAT ] key toggles between the four bases (decimal, hexadecimal, binary, octal).

I did three comparison speed tests between the fx-991CW and fx-991EX  here:  https://www.youtube.com/watch?v=cj0Odnv0Mwk

As I understand, the fx-991CW has a faster processor than the previous fx-991EX.

Now let's talk about what is subtracted in this update.  You read this correctly, several features did not make it from the fx-991EX to the fx-991CW:

The  CALC feature where we could type in a formula, press [ CALC ] and have formula evaluation.  I was not able to find the CALC feature on the fx-991CW.

There is no longer the independent memory M, nor the storage arithmetic functions M+ and M-.  I miss this feature the most.  I really wish scientific and graphing calculators in general embrace store arithmetic like Hewlett Packard and Swiss Micros.

There is no longer the ability to use multi-statement expressions, with each expression separated with a colon.  Even when it was available, (1) storing results immediately terminated the expression (forcing the use of Ans and when available, PreAns to make using results in the next part possible), and (2) when replayed, the statement was broken up into separate parts.  

Addendum 

Note (4/12/2023):  I am wrong when I said that storing results in multi-statements on the fx-991EX (not the fx-991CW) is impossible.  We use the equals key ([ALPHA] ( = )), as in this example:

A = 9 : B = 8 * A

Csaba Tizedes uses the multi-statement and CALC feature on the fx-991EX to create an IF-THEN-ELSE structure.  In this video Tizedes uses this structure to solve equations using the Bisection method.  The IF-THEN-ELSE structure tests whether a number is positive or negative.  Please take a look his video:

https://www.youtube.com/watch?v=umxScZL1V6A

Gratitude to Csaba Tizedes, this video is shared with his permission.  

Final Thoughts

Overall, the fx-991CW is pretty solid calculator with a readable screen and a lot of features.  My favorite part of the updated is the ability to use the functions f(x) and g(x) outside of the table function.  I also like the catalog key and the page up/page down key.

I get that Casio is going for a simpler, non-busy keyboard.  However, I prefer a separate ALPHA key, along with a STORE key: it's the most efficient way to store variables.   A consequence of a non-busy keyboard is that a lot of the commands can only be accessed through menus.  The ALPHA key could have freed nine keys for more common shifted keys such as x!, polar/rectangular conversions, etc.   I would have liked to see a couple of customizable keys where we can store commands, which could be the shift of the multiplication and division keys.  The financial calculator FC-200V has two slots to store commands.

The faster processor and the better screen are pluses.  You will still get a lot for the money spent on the fx-991CW. 

Caveat:   However, if you want, need, or require subtracted features described above (CALC feature, independent memory, multi-statement expressions), you are better off buying the former fx-991EX or a fx-115ES Plus 2nd Edition.  

Unfortunately, removing the multi-statement, Casio sapped it's algorithmic power with the fx-991CW, and it needs to come back.  Furthermore, please put integer part, fraction part, and sign functions.   

Eddie

All original content copyright, © 2011-2023.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author. 

TI-84 Plus CE Wish List and YouTube Shorts

TI-84 Plus CE Wish List and YouTube Shorts

TI-84 Plus CE Wish List

Disclaimer:  I do not work for Texas Instruments nor do I know when (or if) TI is working on and publishing operating version 5.9, 6.0, etc.  This is my opinion only (the opinion of a math and calculator enthusiast).

This focuses on the United States version of the TI-84 Plus CE series.

I would like to see the following in the next update:

1.  Simplification of radicals and square roots.*   Currently the series only has decimal approximations.

Examples:

√440 returns  2 * √110

√75 + √125 returns 5 √5 + 5 √3

2.  Mathematical operations returning exact results in terms of π.*  Like #1, the series only has decimal approximations.

Examples:

In radians mode,  cos^-1 (1/2) returns π/3

2 π - 3/8 * π  returns 13/8 * π

3.  Base mode and conversions.  With the exception of the classic TI-85 and TI-86, the TI-80s do not have a base mode nor base conversions.  I would like to see that added, make room under the test menu.    

4.  More colors than 15 please.   Maybe an RGB (red-green-blue) function in the TI-BASIC programming language?  

With Gratitude to TI. 

YouTube Short:  https://youtube.com/shorts/KOQs95qCHtg?feature=share

* FYI:  #1 and #2 are available on the TI-83 CE Premium from France.  

YouTube Shorts

From time to time, I will post YouTube short videos (60 seconds or less) to my YouTube channel (which has been a long time starving for content):

https://www.youtube.com/@theedspage

My channel covers primarily math and calculators.  

Eddie

All original content copyright, © 2011-2023.  Edward Shore.   Unauthorized use and/or unauthorized distribution for commercial purposes without express and written permission from the author is strictly prohibited.  This blog entry may be distributed for noncommercial purposes, provided that full credit is given to the author.