Display, Scrolling, Order Of Operations, Parentheses; Display, Scrolling, Order Of; Operations, Parentheses - Texas Instruments TI-15 Teachers Manual

Display, Scrolling, Order of

Operations, and Parentheses
Keys
1. X opens a parenthetical expression.
You can have as many as 8
parentheses at one time.
2. Y closes a parenthetical expression.
3. ! and " move the cursor left and
right.
# and $ move the cursor up and
down through previous entries and
results.
© 2000 T I
EXAS NSTRUMENTS
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Notes
The examples on the transparency
masters assume all default
settings.
TM
The EOS transparency master
demonstrates the order in which
the TI-15 completes calculations.
When using parentheses, if you
press ® before pressing Y,
Syn Error is displayed.
Operations inside parentheses are
performed first. Use X or Y to
change the order of operations
and, therefore, change the result.
Example: 1 + 2 x 3 = 7
(1 + 2) x 3 = 9
The first and second lines display
entries up to 11 characters plus a
decimal point, a negative sign, and
a 2-digit positive or negative
exponent. Entries begin on the left
and scroll to the right. An entry will
always wrap at the operator.
Results are displayed right-
justified. If a whole problem will not
fit on the first line, the result will
display on the second line.
TI-15: A Guide for Teachers
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