User manual

© 1999 T
EXAS
I
NSTRUMENTS
I
NCORPORATED
TI-30X ÙS: A Guide for Teachers
40
Keys
1.
D
opens a parenthetical expression.
2.
E
closes a parenthetical expression.
Notes
•
The examples on the transparency masters
assume all default settings.
•
The transparency master showing the
Equation Operating System (EOS
TM
)
demonstrates the order in which the
TI-30X
Ù
S completes calculations.
•
Operations inside parentheses are
performed first. Use
D E
to change the
order of operations and, therefore, change
the result.
Example
: 1 + 2 x 3 = 7
(1 + 2) x 3 = 9
2
1
Order of Operations and Parentheses
4