Texas Instruments TI-84 Plus CE Getting Started page 33

Order Function
6 Addition and subtraction
7 Relational functions, such as > or
8 Logic operator and
9 Logic operators or and xor
Within a priority level, EOS™ evaluates functions from left to right.
Note:
Calculations within parentheses are evaluated first. A number in scientific or
engineering notation, 2.34â6, is interpreted as (2.3x10
the number remains the correct value during the EOS™ calculation.
Implied Multiplication
The TI-84 Plus CE recognizes implied multiplication, so you do not need to
press ¯ to express multiplication in all cases. For example, the TI-84 Plus CE
interprets 2 p, 4sin(46) , 5(1+2) , and (2 ä 5)7 as implied multiplication.
TI-84 Plus CE implied multiplication rules differ from those of some other
Note:
graphing calculators. For example, the TI-84 Plus CE evaluates 1 à 2X as (1 à 2)
, while some graphing calculators may evaluate 1 à 2X as 1 à (2 X).
X
Parentheses
The TI-84 Plus CE completes all calculations inside a pair of parentheses first.
For example, in the expression 4(1+2) , EOS™ first evaluates the portion inside
the parentheses, 1+2, and then multiplies the answer, 3, by 4.
Negation
To enter a negative number, use the negation key. Press k and then enter the
number. On the TI-84 Plus CE, negation is in the third level in the EOS™
hierarchy. Functions in the first level, such as squaring, are evaluated before
negation.
6
) with parentheses so
Evaluating Expressions 29