Texas Instruments TI-73 Explorer Quick start guide
TI-73 / TI-83 Plus Math by Hand Application Page 2
Important Information
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Graphing product applications (Apps) are licensed. See the
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Microsoft, Windows, Windows NT, Apple, and Mac are
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TI-73 / TI-83 Plus Math by Hand Application Page 3
What Is the Math by Hand Application?
The Math by Hand application familiarizes you with mathematical
algorithms for addition, subtraction, multiplication, and division. For each
of these, three different modes are available:
•Step-By-Step mode shows the problem worked out one step at a
time, emphasizing place value in the base-ten system for each
algorithm.
•Fast Math mode shows the problem worked out in an animated
sequence that is similar to how you would solve the problem on
paper.
•Missing Pieces mode is a quiz that presents solved problems with
blank place values. You supply these place values to complete the
algorithm.
The Math by Hand application is a concept application that TI wants to
share with our customers, educators, and students before the product
definition and testing are complete. It is an alpha software version, and as
such, it may contain imperfections, or the coding may be incomplete.
TI invites your feedback concerning the functionality and educational
value of the Math by Hand application. Please send your comments and
TI-73 / TI-83 Plus Math by Hand Application Page 4
What You Need
Note
In this guidebook, any information that pertains to the TI-83 Plus also
pertains to the TI-83 Plus Silver Edition, unless otherwise noted.
Hardware and software
Notes
TI-73 with version 1.60 or higher of the
Graph Explorer software
—or—
TI-83 Plus or TI-83 Plus Silver Edition
with version 1.14 or higher of the
operating system software
You can download a free copy of the
latest Graph Explorer or operating
system software from
education.ti.com/softwareupdates.
Follow the link to Operating Systems.
Computer with Microsoft ® Windows®
95/98/2000, Windows NT®, or Apple®
Mac® OS 7.1 or higher installed
TI-GRAPH LINK™ computer-to-device
cable
If you do not have this cable, call your
distributor, or order the cable from
TI’s online store.
TI-GRAPH LINK software that is
compatible with the TI-73 or the
TI-83 Plus
—or—
TI™ Connect software, which works with
all supported models of Flash-based TI
graphing devices.
You can download free copies of
TI-GRAPH LINK and TI Connect
software from
education.ti.com/softwareupdates.
Follow the link to Connectivity
Software.
TI-73 / TI-83 Plus Math by Hand Application Page 5
Where to Find Installation Instructions
Detailed instructions on installing this and other applications are
available at education.ti.com/guides. Follow the link to Flash
installation instructions.
Getting Help
The instructions in this guidebook are only for this application. If
you need help using the TI-73 or TI-83 Plus, refer to its
comprehensive guidebook at education.ti.com/guides.
TI-73 / TI-83 Plus Math by Hand Application Page 6
Starting and Quitting the Application
Starting the Application
1. Press
nto display the list of applications on your TI73 or
TI83 Plus.
2. Select
MathHand. The application’s information screen is
displayed.
3. Press any key to continue. The developers’ screen is
displayed.
4. Press any key to continue. The SELECT AN OPERATION menu
is displayed.
Quitting the Application
From the SELECT AN OPERATION menu, select QUIT or press
\.
TI-73 / TI-83 Plus Math by Hand Application Page 7
RSTUV
RSTUV
RSTUV
Navigating
Selecting Menu Items
You can select menu items in the following ways.
•Press hor `to highlight the menu item, and then press
¯to select it.
•Press the number key that corresponds to the menu item.
Using On-Screen Options
Each screen displays one or more options along the bottom of
the screen. To select an option, press the graphing key directly
below the option.
For example,
press Tor
Uto select
START.
TI-73 / TI-83 Plus Math by Hand Application Page 8
Using Step-by-Step Mode
The Step-by-Step mode shows an explanation of each step that
you take to solve a problem. This mode emphasizes the base-ten
system to help develop the fast algorithm for an operation. Each
place value is shown separately with details; zeros that are
usually left off for efficiency are shown, and carrying numbers to
the next higher place value is handled in a developmental form.
1. Select an operation from the SELECT AN OPERATION menu.
2. Select
STEP-BY-STEP from the SELECT A MODE screen.
3. Enter the first element of the problem, and then press ¯
or the appropriate operation key (¥, , , or ).
4. Enter the second element of the problem, and then press
¯.
Tip
If you make a mistake when you enter a number, you can correct
it in one of the following ways.
•Press sto delete the entire number.
•Press _to move the cursor to the incorrect number, and then
enter the correct number.
•Press ^to delete the digit at the cursor location.
5. Select
START to display the first step in solving the problem.
TI-73 / TI-83 Plus Math by Hand Application Page 9
6. Select
NEXT STEP to display subsequent steps until the
problem is solved.
7. Select
REPEAT to erase the solution so that you can step
through it again.
—or—
Select BACK to return to the SELECT A MODE menu.
—or—
Select NEW to enter a new problem for the same operation.
TI-73 / TI-83 Plus Math by Hand Application Page 10
The examples below show the algorithms used to solve
problems for each type of operation.
Addition
Example: 34 + 27 = ?
First, the values in the ones place are added, and the
partial sum is shown: 11 =4+7.
Note: Instead of showing the carrying of the 1 to the
tens place above the 3, the partial sum of the values
in the ones place, 11, is shown. This helps students
who are learning the algorithm for the first time or
those who have trouble lining up their writing.
Next, the values in the tens place are added and the
partial sum is shown: 50 =30 +20.
In the final step, the partial sums are added and the
answer is shown: 11 +50 =61.
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