Texas Instruments TI-30X - IIS Scientific Calculator User manual

TI-30XÚ S:
AGuideforTeachers
Developed by
Texas Instruments Incorporated
Activities developed by
Gary Hanson and Aletha Paskett
Illustrated by
Jay Garrison

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers ii
About the Authors
GaryHanson and AlethaPaskett aremathteachersintheJordanIndependentSchoolDistrict
inSandy,Utah.TheydevelopedtheActivitiessectionandassisted inevaluatingthe
appropriatenessoftheexamplesintheHowtoUsethe TI-30X Ù Ssectionofthisguide.
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Note: Using calculators other than the TI-30X IIS may produce results different from those described in these materials.
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© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X IIS: A Guide for Teachers iii
About the Teacher Guide 
How the Teacher Guide is Organized
This guide consists of two sections: Activities
and How to Use the TI-30X ÙS. The Activities
section is a collection of activities for
integrating the TI-30X ÙS into mathematics
instruction. The How To Use the TI-30X ÙS
section is designed to help you teach students
how to use the calculator.
Activities
The activities are designed to be teacher-
directed. They are intended to help develop
mathematical concepts while incorporating the
TI-30X ÙS as a teaching tool. Each activity is
self-contained and includes the following:
• An overview of the mathematical purpose
of the activity.
• The mathematical concepts being
developed.
• The materials needed to perform the
activity.
• The detailed procedure, including step-by-
step TI-30X ÙS key presses.
• A student activity sheet.
How to Use the TI-30X ÚS
This section contains examples on
transparency masters. Chapters are numbered
and include the following.
• An introductory page describing the
calculator keys presented in the example,
the location of those keys on the
TI-30X ÙS, and any pertinent notes about
their functions.
• Transparency masters following the
introductory page and providing examples
of practical applications of the key(s) being
discussed. The key(s) being discussed are
circled on the TI-30X ÙS keyboard.
Things to Keep in Mind
• While many of the examples on the
transparency masters may be used to
develop mathematical concepts, they were
not designed specifically for that purpose.
• For maximum flexibility, each example and
activity is independent of the others.
Select the transparency master
appropriate for the key you are teaching, or
select the activity appropriate for the
mathematical concept you are teaching.
• If an example does not seem appropriate
for your curriculum or grade level, use it to
teach the function of a key (or keys), and
then provide relevant examples of your own.
• To ensure that everyone starts at the
same point, have students reset the
calculator by pressing &and -
simultaneously or by pressing %
and then selecting Y(yes).
Conventions Used in the Teacher Guide
• In the text, brackets [ ] around a key’s
symbol/name indicate that the key is a
second, or alternate, function.
For example: Z
• On the transparency masters, second
functions are shown just as they appear on
the keyboard.
For example: 
How to Order Additional Teacher Guides
To place an order or to request information
about Texas Instruments (TI) calculators,
use our e-mail address: [email protected]
visit our TI calculator home page: www.ti.com/calc
or, call our toll-free number:
1.800.TI.CARES (1.800.842.2737)

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers VI
Table of Contents 
About the Authors
ii
About the Teacher Guide
iii
About the TI-30X
Ö
S
iv
Activities
The Better Batter —
Using the FIX Key
2
Star Voyage —
Using Scientific Notation
6
Trig Functions 10
What’s My Score —
1-Variable Statistics
14
Heart Rates —
1-Variable Statistics
17
WNBA Stats —
2-Variable Statistics
23
How to Use the TI-30X Ú S
1 TI-30X Ö S Basic Operations 29
2 Clear, Insert, and Delete 33
3 Basic Math 36
4 Order of Operations and
Parentheses 40
5 Constant 43
6 Decimals and Decimal Places 45
7 Memory 47
8 Fractions 52
9 Pi 58
10 Powers, Roots, and Reciprocals 61
11 Probability 68
12 Statistics 75
13 Trigonometry 8 1
How to Use the TI-30X Ú S
(continued)(continued)
14 Notation 88
15 Logarithms and Antilogarithms 91
16 Angle Settings and Conversions 94
17 Polar and Rectangular Conversions 98
18 Hyperbolics 100
Appendix A A-1
Quick Reference to Keys
Appendix B B-1
Display Indicators
Appendix C C-1
Error Messages
Appendix D D-1
Support and Service Information
Appendix E E-1
Warranty Information

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 1
The Better Batter —
The FIX Key 2
Star Voyage —
Scientific Notation 6
Trig Functions 10
What’s My Score? —
1-Variable Statistics 14
Heart Rates —
1-Variable Statistics 17
WNBA Stats —
2-Variable Statistics 23
Activities

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 2
The Better Batter — The FIX Key
Overview
Students use %‚on the TI-30X ÙS to change
numbers to different place values. Students
calculate batting averages using the TI-30X ÙS and
then round their answers to three decimal places.
Math Concepts
• rounding
• place value
• division
• comparing and
ordering decimals
Materials
• TI-30X ÙS
• pencil
• student
activity
Introduction
1. Have students practice rounding the following
numbers to 3 decimal places using pencil and
paper.
a. 2.35647 2.356
b. 15.3633 15.363
c. 0.02698 0.027
2. Have students round the following numbers to 4
decimal places using the TI-30X ÙS.
a. 4.39865 4.3987
b. 72.965912 72.9659
c. 0.29516 0.2952
d. 0.00395 0.0040
Activity
Present the following problem to students:
You are going to play Virtual Baseball. You need to
select 9 players from the list to be on your team.
Choose the players with the best batting averages.
Find the batting averages (number of hits
¾
number
of times at bat) rounded to 3 decimal places for each
player. Make a list of your players in order, from
highest to lowest.
See the table on the next page for solutions.
³1. Enter the first number.
4.39865
2. Press %‚to display
the menu that lets you set
the number of decimal
places.
F0123456789
3. Press 4to select 4
decimal places.
4.39865
4. Press <.
4.39865
4.3987

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 3
The Better Batter — The FIX Key (Continued)
Player Number of
Hits
Number of
Times at Bat
Batting
Average
C. Ripken 122 368 0.332
Puckett 119 363 0.328
Molitor 119 364 0.327
Greenwell 104 334 0.311
Tartabull 103 311 0.331
Palmeiro 120 366 0.328
Franco 109 344 0.317
Joyner 105 338 0.311
Boggs 106 329 0.322
Baines 91 290 0.314
Sax 113 388 0.291
Williams 20 74 0.270
Sheridan 15 63 0.238
Barfield 64 284 0.225
Mattingly 109 367 0.297
Hall 87 280 0.311

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 4
The Better Batter —
The FIX Key
Name ___________________________
Date ___________________________
Problems
1. Round the following numbers to 3 decimal places.
a. 2.35647 _________________
b. 15.3633 _________________
c. 0.02698 _________________
2. Using the TI-30X ÙS, round the following numbers to 4 decimal places.
a. 4.39865 _________________
b. 72.965912 _________________
c. 0.29516 _________________
d. 0.00395 _________________

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 5
The Better Batter —
The FIX Key
Name ___________________________
Date ___________________________
Problem
You are going to play Virtual Baseball. You need to select 9 players from the list to
be on your team. Choose the players with the best batting averages.
Procedure
1. Find the batting averages (number of hits ¾number of times at bat) rounded to
3 decimal places for each player.
Player Number of Hits Number of
Times at Bat
Batting Average
(rounded to 3 decimal places)
C. Ripken 122 368
Puckett 119 363
Molitor 119 364
Greenwell 104 334
Tartabull 103 311
Palmeiro 120 366
Franco 109 344
Joyner 105 338
Boggs 106 329
Baines 91 290
Sax 113 388
Williams 20 74
Sheridan 15 63
Barfield 64 284
Mattingly 109 367
Hall 87 280
2. Make a list of your players in order, from highest to lowest.
Player 1 ____________________ Player 6 ____________________
Player 2 ____________________ Player 7 ____________________
Player 3 ____________________ Player 8 ____________________
Player 4 ____________________ Player 9 ____________________
Player 5 ____________________

© 1999 TEXAS INSTRUMENTS INCORPORATED TI-30X ÙS: A Guide for Teachers 6
Star Voyage — Scientific Notation
Overview
Students investigate scientific notation by changing
numbers into scientific notation, and then using
them in calculations.
Math Concepts
• scientific
notation
• addition
• division
Materials
• TI-30X ÙS
• pencil
• student activity
Introduction
Set up the activity by telling your students:
The standard form for scientific notation is a Q10n,
where ais greater than or equal to 1 and less than
10, and nis an integer.
1. Have students practice writing the following
numbers in scientific notation using pencil and
paper.
a. 93 000 000 9.3 Q107
b. 384 000 000 000 3.84 Q1011
c. 0.00000000000234 2.34 Q10-12
d. 0.0000000157 1.57 Q10-8
2. Have students change the following numbers into
scientific notation using the TI-30X ÖS.
a. 12 000 000 1.2 Q107
b. 974 000 000 9.74 Q108
c. 0.0000034 3.4 Q10-6
d. 0.000000004 4 Q10-9
Note: Answers assume the default floating decimal
setting.
1. Enter the first number.
12000000
2. Press %d.
FLO SCI ENG
3. Press "<<.
12000000
1.2x1007
4. Now, just type the next
number and press <.
3. Have students change the following numbers into
floating decimal (standard notation).
a. 5.8 Q10758 000 000
b. 7.32 Q105732 000
c. 6.2 Q10-6 0.0000062
d. 3 Q10-8 0.00000003
Note: To enter a negative number, press Mand then
enter the number.
³1. Enter 5.8; press %C.
5.8¯
2. Enter 7;press %d.
FLO SCI ENG
3. Press !.
FLO SCI ENG
4. Press <<.
5.8¯7
58000000.
5. Type the next number and
press <.