Casio ClassWiz fx-991EX Quick Start Manual
Casio ClassWiz fx-991EX is a versatile scientific calculator featuring a high-resolution display, icon-based menu, and Natural Textbook Display™ notation for easy input of mathematical expressions. It offers a wide range of calculations, including complex number operations, matrix and vector manipulations, statistical analysis, probability distributions, and spreadsheet functions. Additionally, it can solve systems of equations, polynomial equations and inequalities, and perform ratio computations.
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QUICK START GUIDE
fx-991EXhttp://edu.casio.com/
The fx-991EX “ClassWiz” features a high-resolution
display, making it easier to view formulas and symbols.
This remarkable screen can display between 2-6 times
as many characters as other scientific calculators, yet
still runs on solar power.
Use the W key to turn the calculator on, and press
qC(OFF) to power the unit down.
The icon-based menu, accessible via the p key,
allows easy navigation of features using the arrow keys
and the number keys or the Q shortcuts.
The o key can be used like Backspace in a word
processor to delete the character(s) left of the cursor.
The symbols printed on the keys use Natural Textbook
Display™ notation, similar to that found in textbooks.
This makes input of expressions fast and easy.
The n key toggles your calculation results between
Standard (exact) and Decimal forms.
fx-991EXhttp://edu.casio.com/
The fx-991EX “ClassWiz” features a high-resolution
display, making it easier to view formulas and symbols.
This remarkable screen can display between 2-6 times
as many characters as other scientific calculators, yet
still runs on solar power.
Use the W key to turn the calculator on, and press
qC(OFF) to power the unit down.
The icon-based menu, accessible via the p key,
allows easy navigation of features using the arrow keys
and the number keys or the Q shortcuts.
The o key can be used like Backspace in a word
processor to delete the character(s) left of the cursor.
The symbols printed on the keys use Natural Textbook
Display™ notation, similar to that found in textbooks.
This makes input of expressions fast and easy.
The n key toggles your calculation results between
Standard (exact) and Decimal forms.
fx-991EX Quick Start Guide2
Icon Menu Name Description
CALCULATE Perform general computations using Natural Textbook Display™ notation, including
absolute value, logs of any base, summation, derivatives, and integrals.
COMPLEX Perform computations with complex numbers, including a + bi form, polar ( )
form, and conversions between the two.
BASE-N Perform binary, octal, and hexadecimal computations, and convert among those number
bases and base-10.
MATRIX Perform operations on matrices up to 4x4, including matrix arithmetic,
determinants, transpositions, and identity matrices.
VECTOR Perform operations on 2- and 3-dimensional vectors, including vector
arithmetic, dot products, angles, and unit vectors.
STATISTICS Calculate 13 different one-variable statistics, and apply linear, quadratic,
logarithmic, exponential, and geometric (power) regressions.
DISTRIBUTION Investigate Normal, Inverse Normal, Binomial, and Poisson probability and
cumulative distributions.
SPREADSHEET Create spreadsheets with up to 5 columns and 45 rows. Spreadsheet
supports Fill, Cut/Copy/Paste, recursive formulas, Mean, and Sum commands.
TABLE Create tables of values to compare up to 2 functions simultaneously.
EQUATION/
FUNCTION
Solve simultaneous (systems of) equations with up to 4 unknowns, and
polynomials of up to degree 4.
INEQUALITY Solve polynomial inequalities of up to degree 4, with the solution set expressed as
a compound inequality.
RATIO Solve proportions of the form A : B = X : D and A : B = C : X.
The following explains the meaning of each icon on the fx-991EX icon menu
Icon Menu Name Description
CALCULATE Perform general computations using Natural Textbook Display™ notation, including
absolute value, logs of any base, summation, derivatives, and integrals.
COMPLEX Perform computations with complex numbers, including a + bi form, polar ( )
form, and conversions between the two.
BASE-N Perform binary, octal, and hexadecimal computations, and convert among those number
bases and base-10.
MATRIX Perform operations on matrices up to 4x4, including matrix arithmetic,
determinants, transpositions, and identity matrices.
VECTOR Perform operations on 2- and 3-dimensional vectors, including vector
arithmetic, dot products, angles, and unit vectors.
STATISTICS Calculate 13 different one-variable statistics, and apply linear, quadratic,
logarithmic, exponential, and geometric (power) regressions.
DISTRIBUTION Investigate Normal, Inverse Normal, Binomial, and Poisson probability and
cumulative distributions.
SPREADSHEET Create spreadsheets with up to 5 columns and 45 rows. Spreadsheet
supports Fill, Cut/Copy/Paste, recursive formulas, Mean, and Sum commands.
TABLE Create tables of values to compare up to 2 functions simultaneously.
EQUATION/
FUNCTION
Solve simultaneous (systems of) equations with up to 4 unknowns, and
polynomials of up to degree 4.
INEQUALITY Solve polynomial inequalities of up to degree 4, with the solution set expressed as
a compound inequality.
RATIO Solve proportions of the form A : B = X : D and A : B = C : X.
The following explains the meaning of each icon on the fx-991EX icon menu
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