30
Chapter 3: Manual Calculations
3. Now, let’s work on the actual calculation part. Press the
#
key to enter the Calculation screen, and press
C
to clear
any screen entries.
4. Press 505.8
|
t
36. Press
E
to execute the calculation.
5. Press
M
B
2
@
b
,
1
)
E
to
round the answer to the appropriate
degree of accuracy.
2. Arithmetic Keys
There are various keys for arithmetic calculations. Use the
+
-
|
=
,
_
,
(
and
)
keys to perform
basic arithmetic calculations. Press
E
to solve an equation.
E
Executes an expression.
Example
• Calculate 1
+
2.
#
C
1
+
2
E
An expression is a mathematical statement that may use num-
bers and/or variables that represent numbers. This works just like
a regular word sentence; one may ask “how are you?”, and you
may answer “okay.” But what if an incomplete sentence is thrown,
such as “how are”? You’ll wonder, “how are... what?”; it just
doesn’t make sense. A math expression needs to be complete as
well.
1 + 2
,
4x
,
2sinx + cosx
form valid expressions, while “1
+
” and
“cos” do not. If an expression is not complete, the calculator will
display an error message upon pressing the
E
key.
Performing
addition,
subtraction,
multiplication
and division
A Note about
expressions
