Texas Instruments TI-15 Teachers Guide

© 2000 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-15: A Guide for Teachers
107
Place Value
14
How to Use the Place Value Function
When you use the place value function, you can determine the place value of a
specific digit OR the number of ones, tens, hundreds, etc. in a given number.
•
The
‹
mode setting must be
Manual
and the display option
11-.
To determine: Follow these steps: Example:
Place Value Enter the number, press
Œ
, and press
the digit.
Page 108
How Many? Enter the number, press
Œ
, and press
“
,
’
,
‘
,

,
˜
,
™
, or
š
.
Page 110
•
When determining How Many?, be sure to explain to students that
12_ _ . _ _ _ (after you press
‘
on page 110) represents 12 hundreds in
the number 1234.567, or that 123456 . _ (after you press
™
)
represents 123,456 hundredths in the number 1234.567.
•
When a number includes a repeated digit, the calculator first analyzes
its occurrence in the right-most position. To find the place value of other
instances, press the digit again. (See page 109 for an example.)
•
Once
Œ
is active, it is not necessary to press this key before each digit.
To enter a new number, however, you must press
”
, enter the number,
and then press
Œ
again.
•
To exit Place Value, press
”
and the TI-15 returns to Problem Solving,
Manual mode.
How to Use What’s the Digit Function
Another way to display place value is to show the digit that is in the ones
place, the tens place, etc.
•
The
‹
mode setting must be
Manual
and the display option
-1-.
To determine: Follow these steps: Example:
What’s the Digit? Enter the number, press
Œ
, and press
“
,
’
,
‘
,

,
˜
,
™
, or
š
.
Page 111
•
To exit Place Value, press
”
and the TI-15 returns to Problem Solving,
Manual mode.

Texas Instruments TI-15 Specifications

General

Brand	Texas Instruments
Model	TI-15
Category	Calculator
Language	English