About The Ti-15 - Texas Instruments TI-15 Teachers Manual

About the TI.15
Two-Line Display
The first line displays an entry of up to 11
characters. Entries begin on the top left. If
the entry will not fit on the first line, it will
wrap to the second line. When space permits,
both the entry and the result will appear on
the first line.
The second line displays up to 11 characters. If
the entry is too long to fit on the first line, it
will wrap to the second line. If both entry and
result will not fit on the first line, the result is
displayed right-justified on the second line.
Results longer than 10 digits are displayed in
scientific notation.
If an entry will not fit on two lines, it will
continue to wrap; you can view the beginning
of the entry by scrolling up. In this case, only
the result will appear when you press ®.
Display Indicators
Refer to Appendix B for a list of the display
indicators.
Error Messages
Refer to Appendix C for a listing of the error
messages.
Order of Operations
The TI-15 uses the Equation Operating
System (EOSé) to evaluate expressions. The
operation priorities are listed on the
transparency master in Chapter 1, Display,
Scrolling, Order of Operations, and Parentheses .
Because operations inside parentheses are
performed first, you can use X or Y to
change the order of operations and, therefore,
change the result.
© 2000 T I
EXAS NSTRUMENTS
I
NCORPORATED
Menus
Two keys on the TI-15 display menus: ‡
and ¢.
Press $ or # to move down or up through
the menu list. 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.
Previous Entries # $
After an expression is evaluated, use #
and $ to scroll through previous entries
and results, which are stored in the TI-15
history.
Problem Solving (‹)
The Problem Solving tool has three features
that students can use to challenge
themselves with basic math operations or
place value.
Problem Solving (Auto Mode) provides a set
of electronic exercises to challenge the
student's skills in addition, subtraction,
multiplication, and division. Students can
select mode, level of difficulty, and type of
operation.
Problem Solving (Manual Mode) lets
students compose their own problems,
which may include missing elements or
inequalities.
Problem Solving (Place Value) lets students
display the place value of a specific digit, or
display the number of ones, tens, hundreds,
thousands, tenths, hundredths, or
thousandths in a given number.
TI-15: A Guide for Teachers
v