Casio FX250HC - Basic Scientific Calculator Bedienungsanleitung

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NQPOR

fx-82SX/

fx-250HC

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CASIO ELECTRONICS CO., LTD.

Unit 6, 1000 North Circular Road,

London NW2 7JD, U.K.

— 1 —

Contents

Handling Precautions … 2

Modes … 3

Basic Calculations … 5

Constant Calculations … 6

Memory Calculations … 7

Fraction Calculations … 8

Percentage Calculations … 10

Scientific Function Calculations … 11

Statistical Calculations (SD Mode) … 16

Technical Information … 18

ENGLISH

ESPAÑOL

FRANÇAIS

DEUTSCH

ITALIANO

134

— 2 —

Handling Precautions

•Your calculator is made up of precision components. Never

try to take it apart.

•Avoid dropping your calculator and otherwise subjecting

it to strong impact.

•Do not store the calculator or leave it in areas exposed to

high temperature or humidity, or large amounts of dust.

When exposed to low temperature, the calculator may

require more time to display results and may even fail to

operate. Correct operation will resume once the calculator

is brought back to normal temperature.

•The display will go blank and keys will not operate during

calculations. When you are operating the keyboard, be

sure to watch the display to make sure that all your key

operations are being performed correctly.

•Never leave dead batteries in the battery compartment.

They can leak and damage the unit.

•Avoid using volatile liquids such as thinner or benzine to

clean the unit. Wipe it with a soft cloth, or with a cloth that

has been dipped in a solution of water and a neutral de-

tergent and wring out.

•In no event will the manufacturer and its suppliers be liable

to you or any other person for any damages, expenses,

lost profits, lost savings, or any other damages arising out

of malfunction, repairs, or battery replacement. The user

should prepare physical records of data to protect against

such data loss.

•Never dispose of batteries, the liquid crystal panel, or other

components by burning them.

— 3 —

•Before assuming malfunction of the unit, be sure to care-

fully reread this manual and ensure that the problem is not

due to low battery power or operational error.

•The contents of this manual are subject to change without

notice.

•No part of this manual may be reproduced in any form

without the express written consent of the manufacturer.

•Keep this manual on hand for future reference.

Modes

*Display indicators show current mode setting. Absence of

display indicator indicates COMP Mode.

Key

Operation

Mode

Name*

Standard deviation calculations

Normal calculations

Calculations using grads

Calculations using radians

Number of decimal place

specification

Number of significant digit

specification

Cancels FIX and SCI settings

Calculations using degrees

COMP

DEG

RAD

GRA

FIX

SCI

Application

NORM

— 4 —

Note!

•Amode guide is located above the display screen.

•DEG, RAD, and GRA modes can be used in combination

with the COMP and SD modes.

•F9does not exit SD mode.

•F0exits SD mode.

•F0does not clear SCI or FIX specifications.

•Always press tbefore entering DEG, RAD, and GRA

modes.

•Remember to always set the operating mode and angular

unit (DEG, RAD, GRA) before starting your calculation.

— 5 —

Basic Calculations

• Use the COMP mode for basic calculations.

•Example 1: 234.553

23 +4.5 ,53 =

•Example 2: 56(12)(2.5)

56 -12 E\2.5 E=

•Example 3: 23(11020)

2 \3 -1 e20 =

•Example 4: 7845=36

7 -8 ,4 -5 =

•Example 5: =0.3

4 -5 \6 AN=

•Example 6: 2[76(54)]122

2 -O7 +6 -

O5 +4 PP=

•You can skip all Poperations before the =key.

45

–25.5

268.8

6.66666666719

36.

0.3

122.

— 6 —

Constant Calculations

•Press +, ,, -,or \twice after inputting a number to

make that number a constant.

• “K” is on the display while a constant is being used.

•Use the COMP mode for constant calculations.

•Example 1: 2.33, then 2.36

(2.33) 2.3 ++3 =

(2.36) 6 =

•Example 2: 122.3, then 12(9)

(122.3) 12 --2.3 =

(12(9)) 9 E=

•Example 3: 1717171768

(1717) 17 ++=

(171717) =

(17171717) =

•Example 4: 1.748.3521

(1.72)1.7 --=

(1.73)=

(1.74)=

K27.6

K5.3

K4.913

K8.3521

K2.89

K34.

K51.

K68.

K8.3

K–108.

— 7 —

Memory Calculations

•Use the COMP mode for memory calculations.

•Use Y, |, A{and Zfor memory calculations.

Yreplaces current memory contents.

•“M” appears when there is a value in memory.

•To clear memory, press 0Yor tY.

•Example 1: (536)(238)(562)(994)210.75

(536) 53 +6 =Y

(238) 23 ,8 |

(562) 56 -2 |

(994) 99 \4 |

(Memory recall) Z

•Example 2: To calculate the following using memory as

shown.

M15.

M210.75

M13.

M24.75

M112.

M59.

— 8 —

•Example 3: To calculate the following using memory and

a constant: (123)(453)(783)135.

(123) 3 --12 =Y

(453) 45 A{

(783) 78 |

(Memory recall) Z

Fraction Calculations

•Use COMP mode for fraction calculations.

•Total number of digits (including division marks) cannot

exceed 10.

•Example 1:  1

2 C3 +4 C5 =

•Example 2: 3 1  4

3 C1 C4 +

1 C2 C3 =

•Example 3: 2 C4

MK 234.

MK 135.

MK 36.

MK 135.

2 4.

12.

17 15.

411 12.

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