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38 Getting started
Example Calculate
R
23jw14 S
j
8>>nQ3
>h45E
This example illustrates a
number of important
points to be aware of:
• the importance of
delimiters (such as parentheses)
• how to enter negative numbers
• the use of implied versus explicit multiplication.
Parentheses As the example above shows, parentheses are
automatically added to enclose the arguments of
functions, as in LN(). However, you will need to manually
add parentheses—by pressing
R
—to enclose a group
of objects you want operated on as a single unit.
Parentheses provide a way of avoiding arithmetic
ambiguity. In the example above we wanted the entire
numerator divided by –3, thus the entire numerator was
enclosed in parentheses. Without the parentheses, only
14√8 would have been divided by –3.
The following examples show the use of parentheses, and
the use of the cursor keys to move outside a group of
objects enclosed within parentheses.
23
2
14 8–
3–
----------------------------
45ln
Entering ... Calculates …
e
45
+Sz
e
45
>+Sz
Sj
85>
s
9
Sj
85
s
9
45 +sin
45sin +
85 9
85 9