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Texas Instruments TI-80 Manual

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1-10 Operating the TI-80
The TI
.
80 has eight mode settings. They control how numeric entries are
interpreted, how answers are calculated or displayed, and how graphs appear in
the display. Modes are set on the MODE screen (page 1
.
9).
Notation formats affect only how an answer is displayed on
the Home screen. Numeric answers can be displayed with up
to 10 digits and a two-digit exponent. You can enter a number
in any format.
NORMAL
display format is the way in which we usually
express decimal numbers, with digits to the left and right of
the decimal, as in
12345.67
.
SCI
(scientific) notation expresses numbers in two parts. The
significant digits can be displayed with one digit to the left of
the decimal. The appropriate power of 10 displays to the right
of
í
, as in
1.234567
í
4
.
Note: If you select normal display format, but the answer
cannot be displayed in 10 digits or the absolute value is less
than .001, the TI
-
80 displays the answer in scientific notation.
Decimal settings affect only how an answer is displayed on
the Home screen. You can enter a number in any format. The
decimal settings apply to both notation formats.
FLOAT
(floating) decimal setting displays up to 10 digits, plus
the sign and decimal.
The fixed decimal setting lets you select the number of digits
(
0
to
9
) to be displayed to the right of the decimal. The
displayed value is rounded based on the number of digits you
selected. The actual value is stored and used in calculations.
Place the cursor on the number of decimal digits you want,
and press
¸
.
Note: In the program editor, the format for fixed decimal
settings is
FIX
n
. Enter
n
as an integer from
0
to
9
. The mode
is changed to fixed decimal when the program is executed.
TI-80 Modes
NORMAL
SCI
FLOAT
Fixed Decimal
… 36 …


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