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Casio CALCULATOR FX-85GT PLUS User Manual

Casio CALCULATOR FX-85GT PLUS
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E
fx-83GT PLUS
fx-85GT PLUS
User’s Guide
CASIO Worldwide Education Website
http://edu.casio.com
CASIO EDUCATIONAL FORUM
http://edu.casio.com/forum/
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Casio CALCULATOR FX-85GT PLUS Specifications

General IconGeneral
TypeScientific Calculator
Memory9 Variables
Display Digits10 + 2 digits
Weight95 g
Auto Power OffYes
Power SourceBattery
Dimensions13.8 x 77 x 162 mm

Summary

Important Information and Precautions

Safety and Handling Precautions

Guidelines for battery safety, replacement, and proper handling to prevent damage.

Basic Operations and Setup

Case, Power, and Display Adjustments

Covers case removal, power on/off, auto power-off, and contrast adjustment.

Key Markings and Functions

Explains how key text colors indicate alternate functions.

Understanding the Display

Input Expressions and Calculation Results

How expressions and results are shown, including scrolling indicators.

Display Indicator Meanings

Detailed meanings of various indicators shown on the calculator screen.

Calculator Modes and Setup

Using Calculator Menus

How to navigate menus to access calculator functions and options.

Specifying Calculation Modes

Procedures to select calculation modes like COMP, STAT, TABLE, and VERIF.

Configuring Calculator Settings

Accessing the setup menu to change various calculator parameters.

Detailed Setup Settings

Angle and Display Digit Formatting

Sets angle units (Deg, Rad, Gra) and digit display (Fix, Sci, Norm).

Result Display and Format Settings

Configures fraction display, recurring decimals, and decimal point formatting.

Other Setup Configurations

Adjusts STAT frequency display, recurring decimal display, and contrast.

Inputting Expressions and Values

Basic Input Rules

Explains how to input calculations naturally, including priority rules and omitting symbols.

Calculation Priority Sequence

Details the order of operations for evaluating mathematical expressions.

Advanced Input Methods

Inputting with Natural Display

How to input fractions and functions as they appear in textbooks.

Using Values as Arguments

How to use previously input values or expressions as arguments for functions.

Expression Editing and Input Modes

Overwrite Input Mode

How to use overwrite mode for input when Linear Display is selected.

Correcting and Clearing Expressions

Procedures for deleting characters, inserting text, and clearing the entire expression.

Recurring Decimal Calculations

How to input and display recurring decimals using Natural Display.

Recurring Decimal Display

Inputting Recurring Decimals

Step-by-step guide for entering recurring decimal values.

Displaying Results as Recurring Decimals

How to cycle through display formats and conditions for recurring decimal display.

Decimal and Fraction Conversion

Switching Between Result Forms

How to toggle results between fraction, decimal, and π forms.

Calculation Result Formatting

Conditions for Recurring Decimal Display

Criteria that results must meet to be displayed as recurring decimals.

Recurring Decimal Examples

Practical examples of performing recurring decimal calculations.

Toggling Calculation Results

Switching Between Result Forms

How to toggle results between fraction, decimal, and π forms.

Basic Calculations

Fraction Calculations

How to input and calculate with fractions using Natural and Linear Display.

Percent Calculations

How to perform percentage calculations, including increases and discounts.

Specialized Calculations

Degree, Minute, Second Calculations

Performing calculations with sexagesimal values and conversions.

Multi-Statements and Engineering Notation

Connecting expressions and transforming values into engineering notation.

Calculation History and Variables

Replay and Answer Memory

Editing previous expressions and using the last result in new calculations.

Using Variables

Assigning values to variables (A-Y) and using them in calculations.

Memory Management and Prime Factorization

Independent Memory and Clearing

Using independent memory (M) and clearing all calculator memories.

Prime Factorization

Performing prime factorization on integers up to 10 digits.

Function Calculations Overview

Trigonometric, Hyperbolic, and Logarithmic Functions

Using sin, cos, tan, sinh, cosh, tanh, log, and ln functions.

Exponential, Power, and Root Functions

Utilizing 10^x, e^x, x², x³, √x, and ³√x functions.

Advanced Function Capabilities

Factorial, Coordinate Transformations, and Random Numbers

Using x!, Pol/Rec, Abs, Ran#, RanInt# functions.

Specific Function Examples

Square Roots, Factorials, and Random Numbers

Examples for calculations involving roots, factorials, and random number generation.

Coordinate Conversions and Permutations/Combinations

Demonstrations of coordinate conversion and nPr/nCr calculations.

Statistical Calculations (STAT)

Selecting Statistical Calculation Types

Choosing between single-variable and paired-variable statistical calculations.

Inputting Statistical Data

Using the Stat Editor to input data for statistical analysis.

Obtaining Statistical Values

Stat Editor Data Management

Changing, deleting, or inserting data lines within the Stat Editor.

Calculating Statistical Variables

Recalling and calculating statistical values like mean, standard deviation, and sums.

Regression Analysis and Estimation

Calculating Regression Coefficients

Determining coefficients for linear, logarithmic, and other regression types.

Calculating Estimated Values

Estimating y-values from a regression formula based on x-values.

Creating Number Tables

Generating Function Tables

Creating tables of f(x) values for a given range of x.

Using VERIFY (VERIF)

Verifying Equalities and Inequalities

Checking if mathematical expressions are true or false.

Calculation Ranges and Precision

General Calculation Limits and Precision

Overview of calculation ranges, internal digits, and precision for standard calculations.

Function Input Ranges and Precision

Input ranges and precision for trigonometric and other functions.

Function Calculation Input Ranges

Specific Function Input Range Details

Detailed input ranges for various functions like cos, tan, log, powers, and roots.

Errors and Troubleshooting

Displaying and Clearing Error Messages

How to view error locations and clear error messages.

Error Messages and Malfunction Checks

Common Error Types and Actions

Explains Math, Stack, Syntax, MEM, and Argument errors and how to resolve them.

Pre-Malfunction Checks and Initialization

Steps to check for errors and initialize the calculator before concluding malfunction.

Maintenance and Specifications

Replacing the Battery

Step-by-step guide for replacing the calculator's battery and initializing.

Technical Specifications

Details on power, dimensions, weight, and operating temperature.

Frequently Asked Questions

Memory Types and Mode Switching

Explains memory types and how to switch between calculator modes.

Natural Display Function Input Behavior

Explains differences in function calculation input with Natural Display.

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