© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X
Ù
S: A Guide for Teachers
iv
Two-Line Display
The first line (entry line) displays an entry of up
to 88 digits (47 digits for the stat and
constant entry lines). Entries begin on the left;
those with more than 11 digits scroll to the
right. Press
!
and
"
to scroll the entry line.
Press
%
!
or
%
"
to move the cursor
immediately to the beginning or end of the
entry.
The second line (result line) displays a result of
up to 10 digits, plus a decimal point, negative
sign,
x10
indicator, and 2-digit positive or
negative exponent. Results that exceed the
digit limit are displayed in scientific notation.
Display Indicators
Refer to Appendix B for a list of the display
indicators.
Order of Operations
The TI-30X
Ù
S uses the Equation Operating
System (EOS
TM
) to evaluate expressions. The
operation priorities are listed on the
transparency master in Chapter 4, Order of
Operations and Parentheses (page 41).
Because operations inside parentheses are
performed first, you can use
D
E
to change
the order of operations and, therefore, change
the result.
2nd Functions
Pressing
%
displays the
2nd
indicator, and
then accesses the function printed above the
next key pressed. For example,
%
b
25
E
<
calculates the square root of 25 and
returns the result,
5
.
Menus
Certain TI-30X
Ù
S keys display menus:
z
,
%
h
,
L
,
%
t
,
u
,
%
w
,
H
,
I
,
%
k
,
=
%
d
,
%
‚
and
%
.
Press
!
or
"
to move the cursor and
underline a menu item. To return to the
previous screen without selecting the item,
press
-
. To select a menu item:
• Press
<
while the item is underlined, or
• For menu items followed by an argument
value (for example,
nPr
), enter the value
while the item is underlined. The item and
the argument value are displayed on the
previous screen.
Previous Entries
#
$
After an expression is evaluated, use
#
and
$
to scroll through previous entries, which are
stored in the TI-30X
Ù
S history. You cannot
retrieve previous entries while in
STAT
mode.
Error Messages
Refer to Appendix C for a listing of the error
messages.
Last Answer (
Ans)
The most recently calculated result is stored
to the variable
Ans
.
Ans
is retained in memory,
even after the TI-30X
Ù
S is turned off. To
recall the value of
Ans
:
• Press
%
i
(
Ans
displays on the
screen), or
• Press any operation key (
T
,
U
, etc.) as
the first part of an entry.
Ans
and the
operator are both displayed.
About the TI
-30X
Ú
S
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