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Chapter 3: Manual Calculations
2. Arithmetic Keys
Performing
addition,
subtraction,
multiplication
and division
E
A Note about
expressions
30
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.
There are various keys for arithmetic calculations. Use the +
- | =, _, ( and ) keys to perform
basic arithmetic calculations. Press E to solve an equation.
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
"cos" do not. If an expression is not complete, the calculator will
display an error message upon pressing the E key.
+
" and
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