Texas Instruments -34 II Explorer Plus Manuel utilisateur

TI.34 Ü:

A Guide for Teachers

Developed by

Texas Instruments Incorporated

Activities developed by

Gary Hanson and Aletha Paskett

Illustrated by

Jay Garrison

Explorer

Plus™

About the Authors

Gary Hanson and Aletha Paskett are math teachers in the Jordan Independent School District in Sandy,

Utah. They developed the

Activities

section and assisted in evaluating the appropriateness of the examples in

the

How to Use the TI-34 Û

section of this guide.

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Table of Contents 

CHAPTER PAGE

About the Teacher Guide

About the

TI-34 Üvi

Activities 1

The Better Batter 2

The Fix Key

Star Voyage 6

Scientific Notation

Trig Functions 10

What’s My Score 14

1-Variable Statistics

Heart Rates 17

1-Variable Statistics

WNBA Stats 23

2-Variable Statistics

My Favorite Recipe 28

Fractions

Sewing Costumes 32

Fractions

How to Use the TI.34 ÜÜ36

1TI-34 ÜBasic Operations 37

2Editing the Display 41

3Basic Math 44

4Order of Operations 48

5Stored Operations 51

6Decimals and Decimal Places 58

7Memory 60

8Fractions 65

9Pi72

10Powers, Roots, and Reciprocals 75

11Probability 82

12Statistics 89

13Trigonometry 95

14Notation 102

15Logarithms/Antilogarithms 104

CHAPTER PAGE

How to Use the TI-34 ÜÜ(continued)

16Angle Settings and Conversions107

17Polar ÍRectangular Conversions111

18Math Menu 113

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, Service, and Warranty

About the Teacher Guide 

How the Teacher Guide is Organized

This guide consists of two sections:

Activities

and

How to Use the TI-34 Û

. The

Activities

section is a collection of activities for

integrating the TI-34 Ûinto mathematics

instruction.

How To Use the TI-34 Û

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-34 Ûas 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-34 Ûkey presses.

• A student activity sheet.

How to Use the TI.34 Ü

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-34 Û, and any pertinent notes about

their functions.

• Transparency masters following the

introductory page provide examples of

practical applications of the key(s) being

discussed. The key(s) being discussed are

shown in black on the TI-34 Ûkeyboard.

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 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 %,

selecting Y(yes), and then pressing <.

Conventions Used in this Guide

• In the text, brackets [ ] around a key’s

symbol indicate that the key is a second,

or alternate, function.

For example: b

• On the transparency masters, second

functions are shown as they appear on

the TI-34 Ûkeyboard.

How to Order Additional Teacher Guides

To place an order or to request additional

information about Texas Instruments (TI)

calculators, call our toll-free number:

1.800.TI.CARES (1.800.842.2737)

Or use our e-mail address:

[email protected]

Or visit the TI calculator home page:

http://www.ti.com/calc

About the TI.34 Ü

Two-Line Display

The first line (entry line) displays an entry of

up to 88 digits (47 digits for stat or stored

operations entry line). Entries begin on the

left; those with more than 11 digits scroll to

the right. Press !and "to scroll the entry

line. Press %!or %"to move the

cursor immediately to the beginning or end of

the entry.

The second line (result line) displays a result

of up to 10 digits, plus a decimal point, a

negative sign, a “x10” indicator, and a

two-digit positive or negative exponent.

Results that exceed the digit limit are

displayed in scientific notation.

Display Indicators

Refer to Appendix B for a list of the display

indicators.

Order of Operations

The TI-34 Ûuses the Equation Operating

System (EOSé) to evaluate expressions. The

operation priorities are listed on the

transparency master in Chapter 4,

Order of

Operations and Parentheses

Because operations inside parentheses are

performed first, you can use Dor Eto

change the order of operations and,

therefore, change the result.

2nd Functions

Pressing %displays the 2nd indicator, and

then accesses the function printed above the

next key pressed. For example, %b25 E

<calculates the square root of 25 and

returns the result, 5.

Menus

Certain TI-34 Ûkeys display menus:

z, %h, L, %t,

u, %w, H, I,

%k, =, %‚and %.

Press !or "to move the cursor and

underline a menu item. To return to the

previous screen without selecting the item,

press -. To select a menu item:

• Press <while the item is underlined,

• For menu items followed by an argument

value (for example, nPr), enter the value

while the item is underlined. The item and

the argument value are displayed on the

previous screen.

Previous Entries #$

After an expression is evaluated, use #

and $to scroll through previous entries,

which are stored in the TI-34 Ûhistory. You

cannot retrieve previous entries while in

STAT mode.

Error Messages

Refer to Appendix C for a listing of the error

messages.

Last Answer (Ans)

The most recently calculated result is

stored to the variable Ans. Ans is retained

in memory, even after the TI-34 Ûis turned

off. To recall the value of Ans:

• Press %i (Ans displays on the

screen), or

• Press any operation key (T, U, F, and

so on) as the first part of an entry. Ans

and the operator are both displayed.

About the TI.34 Ü(Continued)

Resetting the TI.34 ÜÜ

Pressing &and -simultaneously or

pressing %, selecting Y(yes), and

then pressing <resets the calculator.

Resetting the calculator:

• Returns settings to their defaults:

Standard notation (floating decimal) and

degree mode.

• Clears memory variables, pending

operations, entries in history, statistical

data, constants (stored operations), and

Ans (Last Answer).

Note: The examples on the transparency

masters assume all default settings.

Automatic Power DownTM (APDTM)

If the TI-34 Ûremains inactive for about

5 minutes, Automatic Power Down (APD)

turns it off automatically. Press &after

APD. The display, pending operations,

settings, and memory are retained.

The Better Batter—

The Fix Key 1

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

My Favorite Recipe—

Fractions 28

Sewing Costumes—

Fractions 32

Activities

The Better Batter—The Fix Key

Overview

Students use %‚on the TI-34 Ûto change

numbers to different place values. Students

calculate batting averages using the TI-34 Ûand

then round their answers to 3 decimal places.

Math Concepts

• rounding

• place value

• division

• comparing and

ordering decimals

Materials

•TI-34 Û

• pencil

• student

activity

(page 4)

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-34 Ö.

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/ 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 and

press <.

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

4.3987

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

The Better Batter—

The Fix Key

Name ___________________________

Date ___________________________

1. Round the following numbers to 3 decimal places.

a. 2.35647 _________________

b. 15.3633 _________________

c. 0.02698 _________________

2. Using the TI-34 Ö, round the following numbers to 4 decimal places.

a. 4.39865 _________________

b. 72.965912 _________________

c. 0.29516 _________________

d. 0.00395 _________________

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