Texas Instruments TI-30X IIS User Manual page 5

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 ÙS uses the Equation Operating
TM
System (EOS ) 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.
© 1999 T I I
EXAS NSTRUMENTS NCORPORATED
About the TI -30XÚ S
Menus
Certain TI-30X ÙS 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 ÙS 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 ÙS 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.
TI-30X ÙS: A Guide for Teachers
iv