Entering Expressions And Instructions - Texas Instruments TI-82 STATS Manual Book

Entering Expressions and Instructions

What Is an
Expression?
Entering an
Expression
Multiple Entries
on a Line
1-6 Operating the TI-82 STATS
An expression is a group of numbers, variables, functions and
their arguments, or a combination of these elements. An
expression evaluates to a single answer. On the TI-82 STATS,
you enter an expression in the same order as you would write it
on paper. For example, pR
You can use an expression on the home screen to calculate an
answer. In most places where a value is required, you can use an
expression to enter a value.
To create an expression, you enter numbers, variables, and
functions from the keyboard and menus. An expression is
completed when you press Í, regardless of the cursor
location. The entire expression is evaluated according to
Equation Operating System (EOSé) rules (page 1.22), and the
answer is displayed.
Most TI-82 STATS functions and operations are symbols
comprising several characters. You must enter the symbol from
the keyboard or a menu; do not spell it out. For example, to
calculate the log of 45, you must press «
letters , , and . If you enter
L O G
interprets the entry as implied multiplication of the variables
, and .
O G
Calculate 3.76 ÷ (L7.9 + ‡5) + 2 log 45.
Ë ¥ £ Ì
3 76 7
y [ ¤ ¤
]
5
‡
à « ¤
2 45
Í
To enter two or more expressions or instructions on a line,
separate them with colons (ƒ [
stored together in last entry (
2
is an expression.
, the TI-82 STATS
LOG
Ë Ã
9
]). All instructions are
:
; page 1.16).
ENTRY
. Do not enter the
45
,
L