Casio  Standard Scientific Calculators  fx0991EX
Casio  Standard Scientific Calculators  fx0991EX
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Intuitive, easytolearn icon display
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.
Easytounderstand 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
Spreadsheet calculations
Useful for learning statistics. Up to 5 columns × 45 rows (maximum of 170 data items)
Matrix calculations
Perform calculations with matrices of up to 4 rows and 4 columns.
Vector calculations
Perform calculations using up to four thirdorder vectors stored in memory.
Multiline display
Formulas are automatically wrapped to multiple lines. *
*In linear input mode
Integration calculations
Perform integration calculations in advanced mathematics.
Differential calculations
Perform differential calculations in advanced mathematics.
Equation calculations
Calculation of simultaneous equations in 2 to 4 unknowns and highdegree equations of second to fourth degree
Inequality calculations
Solve seconddegree to fourthdegree inequalities.
Advanced statistical distribution calculations
Perform calculations involving normal distributions, binomial distributions, and Poisson distributions.
Ratio calculations
Perform ratio calculations such as A:B=X:D.
Metric conversions
Select units from the Metric Conversion Command List.
Scientific constants
Select scientific constants from the Scientific Constant Table.
Variables list
Onetouch list display
Statistics list
Displays six rows at once.
Digit separator
Separation every three digits makes even large numbers easy to read.
Engineering symbols
Perform engineering calculations that include symbols such as k, M, m, and n.

Basic calculation
Basic CalculationBracket CalculationFraction CalculationDegree, Minute, Secound (Sexagesimal) CalculationsReciprocal CalculationPercent Calculation (scientific calculator function)Ratio calculationFactorial FunctionπCalculation with √ and πRounding Function 
Advanced calculation
Transcendental number: eBasen calculationLogical OperatorsComplex number calculationMatrix calculationsVector calculationsDifferential calculationIntegration calculation 
Applied calculation
Multistatement Command (:)Continuous CalculationReplay FunctionMultireplay FunctionUNDOCALC FunctionSOLVE Function

Basic functions
Basic Mathematical FunctionsNumber of Functions : 552Independent Key xAbsolute Value CalculationPower Function (Square)Power Function (Cube)Power FunctionPower Function (Square Root)Trigonometric FunctionInverse Trigonometric FunctionHyperbolic / Inverse Hyperbolic FunctionExponential CalculationLogarithmic CalculationLog not base 10Coordinate ConversionCombination / PermutationPrime FactorizationRandom Number GenerationRandom Integer GenerationSummation 
Other functions
SpreadsheetEquationInequality Calculations 
Physics and chemistryrelated functions
Scientific ConstantsMetric conversion function

Statistical data
List based STATdata editor 
Statistical calculation
Statistics FunctionBasic StatisticsIntermediate StatisticsAdvanced StatisticsDistribution Calculations

Permitted in exams
GCSE/AS/A Level

Connection to peripheral devices
QR Code