Texas Instruments TI-89 Manual Book page 48

Display Digits Mode
Note: Regardless of the
Display Digits setting, the
full value is used for internal
floating-point calculations to
ensure maximum accuracy.
Note: A result is
automatically shown in
scientific notation if its
magnitude cannot be
displayed in the selected
number of digits.
Exponential Format
Mode
Note: In the history area, a
number in an entry is
displayed in if
SCIENTIFIC
its absolute value is less
than .001.
By default,
Display Digits = FLOAT 6
rounded to a maximum of six digits. You can use 3 to select
different settings. The settings apply to all exponential formats.
Internally, the
TI-89 / TI-92 Plus
results with up to 14 significant digits (although a maximum of 12 are
displayed).
Setting Example
FIX 123.
(0 – 12) 123.5
123.46
123.457
FLOAT 123.456789012
FLOAT 1. 2
E
(1 – 12) 1.2 2
E
123.
123.5
123.46
123.457
By default, Exponential Format = NORMAL
You can use 3 to select from three
settings.
Setting Example
NORMAL 12345.6
SCIENTIFIC 1.23456
ENGINEERING 12.3456
, which means that results are
calculates and retains all decimal
Description
(FIX 0) Results are rounded to the
selected number of decimal
(FIX 1)
(FIX 2) places.
(FIX 3)
Number of decimal places varies,
depending on the result.
Results are rounded to the total
(FLOAT 1)
number of selected digits.
(FLOAT 2)
(FLOAT 3)
(FLOAT 4)
(FLOAT 5)
(FLOAT 6)
.
Description
If a result cannot be displayed in the
number of digits specified by the
Display Digits
TI-89 / TI-92 Plus
to
NORMAL SCIENTIFIC
result only.
4
4 1.23456 10
E
Exponent (power of 10).
Always 1 digit to the left of the
decimal point.
3
3 12.3456 10
E
Exponent is a multiple of 3.
May have 1, 2, or 3 digits to the
left of the decimal point.
Chapter 2: Operating the Calculator
mode, the
switches from
for that
31