CASIO

fx-115ES PLUS
fx-991ES PLUS C
(2nd edition / NATURAL-V.P.A.M.)

Before Using the Calculator

• ▶About this Manual
• ▶Initializing the Calculator
• ▶Precautions
  • Safety Precautions
  • Handling Precautions
• ▶Getting Started
  • Removing the Hard Case
  • Turning Power On and Off
  • Adjusting Display Contrast
  • Key Markings
  • Reading the Display
  • Using Menus

Calculation Modes and Calculator Setup

• ▶Calculation Mode
• ▶Configuring the Calculator Setup
  • Initializing Calculator Settings

Inputting Expressions and Values

• ▶Basic Input Rules
• ▶Inputting with Natural Display
• ▶√  Form Calculation Range
• ▶Using Values and Expressions as Arguments (Natural Display only)
• ▶Overwrite Input Mode (Linear Display only)
• ▶Correcting and Clearing an Expression

Basic Calculations

• ▶Toggling Calculation Results
• ▶Fraction Calculations
• ▶Percent Calculations
• ▶Degree, Minute, Second (Sexagesimal) Calculations
• ▶Multi-Statements
• ▶Using Engineering Notation
• ▶Remainder Calculations
• ▶Recurring Decimal Calculations
• ▶Prime Factorization
• ▶Calculation History and Replay
  • Calculation History
  • Replay
• ▶Using Memory Functions
  • Answer Memory (Ans)/Previous Answer Memory (PreAns)
  • Variables (A, B, C, D, E, F, M, X, Y)
  • Independent Memory (M)
  • Clearing the Contents of All Memories

Function Calculations

• ▶Pi (π), Natural Logarithm Base e
• ▶Trigonometric Functions
• ▶Hyperbolic Functions
• ▶Angle Unit Conversion
• ▶Exponential Functions
• ▶Logarithmic Functions
• ▶Power Functions and Power Root Functions
• ▶Integration Calculations
  • Integration Calculation Precautions
  • Tips for Successful Integration Calculations
• ▶Differential Calculations
  • Differential Calculation Precautions
• ▶Σ Calculations
• ▶Π Calculations
• ▶Rectangular-Polar Coordinate Conversion
• ▶Factorial Function (!)
• ▶Absolute Value Function (Abs)
• ▶Random Number (Ran#)
• ▶Random Integer (RanInt#)
• ▶Permutation (nPr) and Combination (nCr)
• ▶Rounding Function (Rnd)
• ▶Greatest Common Divisor (GCD) and Least Common Multiple (LCM)
• ▶Integer Part of a Value (Int) and Largest Integer that does not Exceed a Value (Intg)
• ▶Using CALC
• ▶Using SOLVE
  • Solution Screen Contents
  • Continue Screen
• ▶Scientific Constants
• ▶Metric Conversion

Using Calculation Modes

• ▶Complex Number Calculations (CMPLX)
  • CMPLX Mode Calculation Examples
  • Using a Command to Specify the Calculation Result Format
• ▶Statistical Calculations (STAT)
  • Inputting Data
  • Statistics Calculation Screen
  • Using the Statistics Menu
  • Calculating Estimated Values
  • Performing Normal Distribution Calculations
• ▶Base-n Calculations (BASE-N)
  • Specifying the Number Mode of a Particular Input Value
  • Converting a Calculation Result to another Type of Value
  • Logical and Negation Operations
• ▶Equation Calculations (EQN)
  • Changing the Current Equation Type Setting
  • EQN Mode Calculation Examples
• ▶Matrix Calculations (MATRIX)
  • Matrix Answer Memory
  • Assigning and Editing Matrix Variable Data
  • Matrix Calculation Examples
• ▶Creating a Numerical Table from Two Functions (TABLE)
• ▶Vector Calculations (VECTOR)
  • Vector Answer Memory
  • Assigning and Editing Vector Variable Data
  • Vector Calculation Examples
• ▶Inequality Calculations (INEQ)
  • Changing tha Inequality Type
  • INEQ Mode Calculation Examples
  • Special Solution Display
• ▶Using VERIFY (VERIF)
  • Expression Input Precautions
  • VERIFY Mode Calculation Examples
• ▶Distribution Calculations (DIST)
  • Variables that Accept Input
  • List Screen (Binomial PD, Binomial CD, Poisson PD, Poisson CD)
  • DIST Mode Calculation Examples

Technical Information

• ▶Errors
  • Displaying the Location of an Error
  • Clearing the Error Message
  • Error Messages
• ▶Before Assuming Malfunction of the Calculator...
• ▶Replacing the Battery
• ▶Calculation Priority Sequence
• ▶Calculation Ranges, Number of Digits, and Precision
  • Calculation Range and Precision
  • Function Calculation Input Ranges and Precision
• ▶Specifications
• ▶Verifying the Authenticity of Your Calculator

Frequently Asked Questions

• ▶Frequently Asked Questions