Texas Instruments TI15TK Teacher Guide - Page 114

How to Use the Place Value Function, Manual, How to Use What's the Digit Function, To exit Place Value

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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: Place Value Follow these steps: Example: Enter the number, press Œ, and press Page 108 the digit. How Many? Enter the number, press Œ, and press Page 110 or š. • 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: What's the Digit? Follow these steps: Example: Enter the number, press Œ, and press Page 111 or š. • To exit Place Value, press " and the TI-15 returns to Problem Solving, Manual mode. © 2000 TEXAS INSTRUMENTS INCORPORATED TI-15: A Guide for Teachers 107

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© 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.