Casio 991ex

Casio ClassWiz FX-991EX Scientific Calculator - Icon Menu Display, Textbook Display, Slide-on Hard Case, Spreadsheet, Natural-VPAM - Solar, Battery Powered - 3' x 6.5' x 0.4' - 1 Each Item # 151154. Emulator for scientific calculators. Download the emulator software and manuals you require for the fx-991EX, fx-85GTX and fx-83GTX. Please note that these emulators are only available for Windows. Casio FX-991EX Original Scientific Calculator Classwiz 552 function Spreadsheet. $24.99 previous price $24.99. Casio Scientific Calculator Fx-991N. $4.99 + $2.89 shipping. Casio Authentic FX-991Es PLUS Scientific Calculator 417 functions New in box. A PDF reader is required to view PDF files. If you don't have one, click on the banner to download one.

The New Classroom Standard
With High-resolution LCD Technology

ClassWiz has intuitive operability and high performance functions, so ideal for education.

• 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

• Solve the simultaneous equations.
  {x + 2y = 32x +3y = 4

• The 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.

Recursion

In addition, the spreadsheet function makes it possible to enter recursive formulas.

Sequence: a₁=2 and a_n+1 -2a_n-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.

Casio Fx 991ex Functions

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.

Casio Fx 991ex Classwiz

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

Casio 991ex Price

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.

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

• 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

• STEP 2

  QR Code

• STEP 3

  Display the manual

• Makes learning to operate the calculator fast and easy

5 Quality Authentic quality

Excellent quality and authentication ensure confidence and peace of mind for use in educational settings

1Tough & Sustainable

CASIO has established three criteria to ensure excellent quality in the ClassWiz series.

• 1.Wear-resistant printing

  2,000-cycle wear testing

  Since ClassWiz calculators are products used for many years as learning tools, the keys are made of a material that offers high durability and resistance to print peeling.

• 2.Drop-resistant body

  Drop testing from a height of 75 cm

  The high product quality prevents malfunction or breakage when a calculator is dropped.

• 3.Environmentally friendly

  Compliant with RoHS environmental regulations

  The materials used in ClassWiz series calculators comply with European RoHS environmental regulations, an international standard.

  *Complies with DEHP, BBP, DBP, and DIBP

These three quality features ensure that CASIO ClassWiz series calculators are educational tools that effectively support learning.

2Authenticity Check

Two methods enable authenticity checking before and after purchase.
Furthermore, Premium Content is available to registered users of genuine ClassWiz series calculators.

6 Premium content

A variety of original CASIO content is available to make learning mathematics fun.

Users can access this content by registering after the authentication check.

School

Math and Science Division Chair at Lyons Township High School
LaGrange Illinois (USA)

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.

Solving equations is possible with the equation solver in the fx-991ES PLUS or fx-991EX calculator’s shift-solve functionality. Once the equation has been entered, the calculator uses the Newton-Raphson numerical method to solve the equation. Because the equation solver uses a numerical method, it only works with equations with a single variable, but can find multiple values.

For example, I will solve the following equation for x:

1. Enter the left expression using X. An X is inserted for variable that you wish to solve.
2. Use = accessible through ALPHACALC. This inserts an equals sign.
3. Enter the right expression.
4. shift-solve to enter equation solve by pressing SHIFTCALC. Solve for X will be shown on screen.
5. If applicable, enter a number as the starting point. This Casio calculator uses Newton-Raphson numerical method solving for x. The current value of X is displayed for reference and will be used if no new value is provided.
6. Press = to solve the equation. The calculator may take a few seconds.

The first value of x as found by the numerical method will be provided on the screen and is saved to the X variable. The difference between the left expression and the right expression is shown as the solution to L–R.

Caveats: As mentioned, this only works with equations with one variable. The variable can be used multiple times, as shown in this example, however you can’t use two or more variables such as x and y. If you wish to use more than one variable, you need to use the quadratic equation solve.

Casio 991ex Calculator

Furthermore, the Newton-Raphson numerical method only returns one value. To find another value, change the start point at step 4. For example, if there are two solutions, one positive and one negative, and you find the positive one, enter a negative number for the start point to find the negative answer.

Buy a Casio fx-991EX calculator on Amazon using this affiliate link to help support this site.