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38 Getting started
If you make a mistake while entering an expression, you
can:
• delete the character to the left of the cursor by
pressing
C
• delete the character to the right of the cursor by
pressing
S
C
• clear the entire entry line by pressing O or J.
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.
23
2
14 8–
3–
----------------------------
45ln