Scientific Calculator fx-991 MS 2nd Edition | CASIO
1 Design Simple and easy to use
Optimal education tools realized through a design that emphasizes comfort in the hand, legibility, and usability through the pursuit of simplicity
Instantaneous key recognition and ease of operation, the result of careful attention to design details
More comfortable in the hand!
A rounded design that fits naturally in the hand and a slim body that's comfortable to hold
Attachable and detachable in any direction!
Hard case that's attachable and detachable in any direction for greater ease of use
The frequently used number keys have been enlarged, and the keys are printed in an easy-to-read font.
Easier to use!
Highly visible, easy-to-press cursor keys and function keys
The photo shows the fx-991MS 2nd edition.
Quality Authentic quality
Excellent quality and authentication ensure confidence and peace of mind for use in educational settings
CASIO has established three criteria to ensure excellent quality in the MS series.
2,000-cycle wear testing
Since these calculators are products used as educational tools for long periods of time, materials that ensure robust key durability and prevent wear or fading of key markings are used to ensure product quality.
Drop testing from a height of 75 cm
High product quality prevents key malfunction due to drop impact if a calculator falls to the floor from a desk in the classroom or display (LCD) or key breakage if a calculator is accidentally crushed in a schoolbag.
Compliant with RoHS environmental regulations
The materials used in MS series calculators comply with European RoHS environmental regulations, an international standard. The product quality reflects concern for health and the environment.
* Complies with DEHP, BBP, DBP, DIBP.
These three quality features ensure that CASIO MS series calculators are educational tools that provide effective support for learning
A sticker printed with a QR Code* and hologram is affixed to each CASIO MS series calculator package. A product can be authenticated by scanning the QR Code and confirming it using the Web Authenticity Check System and examining the hologram.
* QR Code is a registered trademark of DENSO WAVE INCORPORATED in Japan and other countries.
Web Authenticity Check System
This system is a service for checking the authenticity of a product by reading a QR Code on a hologram sticker affixed to the product.
Web Authenticity Check Procedure
A hologram sticker is affixed to the package.
Please confirm the sticker.
The photo shows the fx-991MS 2nd edition.
Note: The example shown is a simulated QR Code.
Read the QR Code section of the hologram sticker affixed to the package with your smartphone.
Go to the QR Code link. One of the three pages below will appear.
Likely to be a genuine product.
May not be a genuine product.
Not a genuine product. Please do not purchase.
Note: The Web Authenticity Check estimates the authenticity of the hologram sticker based on QR Code read status trends. This check does not necessarily guarantee the product is genuine.
A QR Code and sticker printed with a hologram as shown below are affixed to the product package.
The hologram has an iridescent rainbow color section and a shiny white section, and the CASIO logo is visible.
Note: This differs from the actual colors because color shades vary depending on the direction of the light.
The hologram sticker has the following characteristics that make it difficult to copy.
- When the sticker is tilted to the left and right, the color changes.
- When the sticker is rotated, the shading is reversed.
Note: A hologram sticker is affixed in limited countries.
Use the above characteristics to authenticate a product.
Function High functionality, excellent operability
Functions designed with education in mind
1Equipped with functions necessary for education
MS series calculators come with Scientific calculation, statistical calculation, differential*, and integration* functions.
* fx-991MS 2nd edition, fx-570MS 2nd edition, fx-100MS 2nd edition only
Exponent notation is the same as the notation in textbooks.
Super Visually Perfect Algebraic Method
Input and calculate in textbook format.
Two-line display lets you view the expression and its result at the same time.
Move the cursor to make changes for recalculation without having to input the entire expression.
The Natural Display (Natural-V.P.A.M.) shows mathematical expressions like roots and fractions as they appear in your textbook, and this increases comprehension because results are easier to understand.
- Dot matrix display
- 15 and 10+2 digits
- 417 functions
- Equation solver
- 20 pairs of values for metric conversion
- Calculation with complex numbers
- Calc key (temporary formula memory)
- 40 physical constants
- Matrix/vector calculation
- Numerical integral & differential calculus
- Random Integers
- New equation Mode
- Function table
- Non-Programmable Scientific Calculator with 401 Functions with 2-line Display. Comes with slide-on hard case
- 2nd edition comes same features with new sleek Design with curved edges which makes it compact and easy to carry
- S-V.P.A.M. (Super Visually Perfect Algebraic Method): All the features of the existing V.P.A.M. series plus a new 2-line display and a useful Replay function. All this helps to make mathematics easier to use and easier to understand than ever before
- Multi-replay: Quick and easy recall of previously executed formulas for editing and re-execution 10 + 2 digits: 10-digit mantissa + 2-digit exponential display.
- Solves Differentiation, Integration, Statistics, Regression, Matrix, Vector