Casio fx-82MS Manual

C A S I O fx-82MS

MASTERING THE
CALCULATOR USING THE
CASIO fx-82MS
Learning and Teaching Support Unit (LTSU)
The Learning Centre
Guide book
Written by
Linda Galligan

Published by
University of Southern Queensland
Toowoomba Queensland 4350
Australia
http://www.usq.edu.au
©University of Southern Queensland, 2006.1.
Copyrighted materials reproduced herein are used under the provisions of the Copyright Act 1968 as amended, or
as a result of application to the copyright owner.
No part of this publication may be reproduced, stored in a retrieval system or transmitted in any form or by any
means electronic, mechanical, photocopying, recording or otherwise without prior permission.
Produced by the Distance and e-Learning Centre using FrameMaker5.5.6 on a Pentium workstation.

TABLE OF
CONTENTS
PAGE
Introduction 1
A word about starting out 2
1. Addition and subtraction 4
2. Multiplication and division 8
3. Brackets 10
4. Powers 11
5. Fractions 17
6. Using the x–1 key 19
7. Scientific notation 20
8. Factorial x!22
9. Using memory 23
10. Statistics 25
11. Linear regression 31
12. Trigonometric functions 34

13. Exponential and logarithmic functions 36
14. Degrees, minutes, seconds 38
Review calculator exercises 41
Calculator solutions 42
Your notes 44

Mastering the Calculator using the Casio fx-82MS 1
Introduction
This is one in a series of booklets prepared to assist students who are learning to use a
calculator. They have been prepared by staff in The Learning Centre from the Learning and
Teaching Support Unit (LTSU) at USQ. The series comprises:
Mastering the calculator
•Using the Casio fx-100s (also suitable for Casio fx-570)
•Using the Casio fx-100AU
•Using the Casio fx-82LB
•Using the Casio fx-82TL
•Using the Casio fx-82MS
•Using the Sharp EL-531LH
•Using the Sharp EL-556L
•Using the Sharp EL-531RH
The instructions in this booklet only explain some of the keys available on your calculator
necessary for basic work in data manipulation. If you require more assistance please contact
The Learning Centre. If you would like information about other support services available
from The Learning Centre, please contact
The Learning Centre (TLC)
Learning and Teaching Support Unit (LTSU), S-Block
The University of Southern Queensland
Telephone: [phone]
Email: [email protected]
Fax: [phone]
Home page: http://www.usq.edu.au/ltsu
Note the booklets are also available online at the above address (follow the prompts).

2Mastering the Calculator using the Casio fx-82MS
A word about starting out
•Make sure you are in the correct mode selection and that all previous data is cleared.
•Example: To perform arithmetic operations press
•To clear all values press
•To clear memory press
The screen displays
Press to clear memory
•If your calculator has FIX or SCI on the display press three times
appears on the screen
press 3, then 2 so you are in Normal mode.
•If your calculator has RAD or GRAD on the display press two times
appears on the screen
press 1 so you are in Degree mode.
Mcl Mode All

Mastering the Calculator using the Casio fx-82MS 3
•There is also a mode which gives you a preference for displaying the decimal point as a
dot or comma as 34.26 or 34, 26.
Press four times until is displayed.
Press then forward once
Press for dot end (separates thousands with comma)
Press for comma (separates thousands with dot).
DISP
1

4Mastering the Calculator using the Casio fx-82MS
1. Addition and subtraction
1.1 To add numbers
Find the key
(it is shown on the photograph of the calculator here).
Example
To add 7 and 3, type
The display should read 10
Example
I want to find the total amount I earned in the past four weeks. If I earned $471, $575, $471
and $528, the key strokes would be
The display should read 2045.
addition key
DEL key

Mastering the Calculator using the Casio fx-82MS 5
1.2 Sometimes you make an error when typing in a number
If this happens use the key to cancel the number and then type in the correct number
and continue.
Example
If you want to enter 3 + 4 but accidentally type
press to cancel the 5.
Now type
Example
If I want to add 471 and 575 but I typed
I can cancel 6 by typing and then typing
The display should read 1 046.
‘Try practising cancelling with the key until you are comfortable with its use.’
1.3 The keys are used when you to delete other data
Example
If you typed:
471 + 546
but you wanted 471 + 576
press the key twice. The 4 flashes. Press . The 7 now replaces the 4.
Press .
The display should read 1 047.
Practice using this key when replacing digits, operation keys (+ – ×÷), or more than one digit
(use the DEL key).

6Mastering the Calculator using the Casio fx-82MS
You can also use the insert key to insert anything you omitted.
Example
If you typed 471 + 56
but you wanted 471 + 576, press
the display should read 1047.
1.4 To subtract numbers
Find the key (it is shown on the photograph of the calculator following).
Example
To subtract 35 from 257, type
The display should read 222
negative key
subtraction key

Mastering the Calculator using the Casio fx-82MS 7
Example
348 – 24 – 19
The keystrokes are
The display should read 305.
Sometimes you may have a sum like this:
-7 + 4
You can use the key.
The key strokes are
The display should read -3.
You could also use the keystrokes
In this case the calculator recognises the – as a negative (not recommended to do it this way).

8Mastering the Calculator using the Casio fx-82MS
2. Multiplication and division
2.1 To multiply numbers
Find the key (it is shown on the photograph of your calculator here).
Example
To multiply 7 and 3, type
The display should read 21
To find 753 ×492, type
The display should read 370 476
key for division
key for multiplication

Mastering the Calculator using the Casio fx-82MS 9
2.2 To divide numbers
Find the key (it is shown here on the photograph of the calculator)
Example
To divide 35 by 7, type
The display should read 5
To divide 7 905 by 85, type
The display should read 93
To divide 56 by 23947 type
The display should read 0.002338497
If it reads 2.3385×10-03 or something similar, then your calculator is in SCI (Scientific mode).
See page 2 to change to NORM (normal mode).
2.3 Combining multiplication and division
Example
If the question is
then
it is really 27 ÷7 ÷4.
Try it.
The display should read 0.964285714
27
74
×
-
-------
----

10 Mastering the Calculator using the Casio fx-82MS
3. Brackets
Find the set of bracket keys on your calculator.
The fx-100AU allows you to use many sets of brackets.
Example
Do the calculation 471 – (93 + 11 + 2) on the calculator. (Make sure your calculation is in
ordinary comp. mode – )
The keystrokes required are
The display should read 365.
Sometimes in calculations you will see other grouping symbols, for example, { } (called
braces), [ ] (called square brackets).
LH bracket key RH bracket key

Mastering the Calculator using the Casio fx-82MS 11
Try these examples:
Exercise 1
(a) 25 + (7 + 2 – 4)
(b) 18 (3 + 7) [a multiplication sign is understood 18 ×(3 + 7)] but you don’t need to press the
× key
(c) 4 + 5 [2 (3 + 7)] [to use two sets of brackets just press the same button]
(d)
Answers: 30; 180; 104; 1
4. Powers
4.1 Squaring and higher powers
62means 6 ×6. You can use the square key to do this calculation. (It is shown on the
photograph of your calculator here.)
5
32+()
-
------------
----
power key
square key
square root key

12 Mastering the Calculator using the Casio fx-82MS
Press
the display should read 36.
Or you can use the power key on your calculator.
Find the ^ key on your calculator (similar to the key on your computer keyboard).
Example
To square 6,
that is, find 62, type
The display should read 36
To find 273the required key strokes are
and the display should read 19683.
If you have learnt your multiplication tables you will already know the squares of the whole
numbers from 1 to 12 and thus be able to complete much of the following table.
__________________________________________________________________________
Exercise 2
Use your calculator to find the squares of the whole numbers from 13 to 25 and any other
squares you are unsure of.
__________________________________________________________________________
12= 1 112= 212=
22= 4 122= 222=
32= 9 132= 232= 529
42= 142= 242= 576
52= 152= 252= 625
62= 162=
72= 172=
82= 182=
92= 192=
102202

Mastering the Calculator using the Casio fx-82MS 13
Exercise 3
You can use this key for other powers as well. Try these examples
(a) 74
(b) 810
(c) (0.4)6(you do not have to type the brackets in)
(d) (–7)6 (you need to type the brackets in)
(e) 50.4
(f) 5–4
__________________________________________________________________________
Answers:
(a) 2401
(b) 1073741824
(c) 4.096 ×10–3 or 0.004096 (you move the decimal 3 places to the left)
(d) 117649
(e) 1.903653939
(f) 0.0016 [Just press 5–4 is the same as
so you could press to get the same answer]
__________________________________________________________________________
4.2 Square root
Finding the square root of a number ‘undoes’ or ‘neutralises’ the squaring of the number and
vice versa. The symbol for square root is
(This is called the radical sign)
The square root of 36 is written as
Now because 62= 36, .
Find the square root key on your calculator and type
1
54
-----
3
6
36
6
=

14 Mastering the Calculator using the Casio fx-82MS
The display will read 6.
What do you think is? =
__________________________________________________________________________
You should have said 9 because 92= 81
(Check your calculator)
__________________________________________________________________________
What do you think will be? You should have said ‘you can’t find the square root of a
negative’ since you can’t find a number that squares to give a positive. Your calculator will say
Math ERROR.
Exercise 4
Try these by looking at the table of squares you completed on the previous page and then
check your answers on your calculator
__________________________________________________________________________
The answers are 4, 12, 10, 21, 7, 13, 11, 19.
Let’s now check that taking the square root neutralises squaring.
Try this on your calculator.
Find the square root of 3 squared that is,
The key strokes required are
The display should read 3
Because squaring and taking square roots are inverse operations, the order of the operatons
can be reversed and the number is unaffected.
So the square, of the square root of 3, should also equal 3
Try it on your calculator. The key strokes required are
__________________________________________________________________________
(a) = (e) =
(b) = (f) =
(c) = (g) =
(d) = (h) =
8
1
8
1
4
9
–
1
6
4
9
14
4
16
9
10
0
12
1
44
1
36
1
3
2

Mastering the Calculator using the Casio fx-82MS 15
Exercise 5
Complete the following without using the calculator
(a) =
(b) =
(c) =
(d) =10
(e) =625
(f) =144
(g) =, because 82=
(h) =, because = 121
(i) =, because =
Check your answers on the calculator.
__________________________________________________________________________
4.3 Other roots
You can also use the root key on the calculator. Find the on your calculator. To get to this
key you must press shift first.
7
2
7
2
10
2
2
2
2
6
4
12
1
22
5
root key
shift key