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Chapter 3: Basic Calculations — Basic Keyboard
CONCEPT
1. Enter a math expression, then perform the calculation.
2. Save a number into a variable, then recall the value later.
PROCEDURE
1. First, press #, then C to clear any screen entries.
2. Type 186282 = 7.5,
then press E. The
circumference of the earth is
thus obtained.
3. Store the answer in a variable. A variable is a symbol under
which you can store a numerical value.
We will use variable A to
store the circumference of
the earth. Press R to set
the “store” mode. Press
A A, then E to
store the answer. To call up
the stored answer, press A A E again.
Note: While checking the stored values, you may see “0”; this means
that no value is stored in the variable.
4. Now, since the value you
have stored under “A” is the
distance you will be travel-
ling in 24 hours, divide the
number by 24. Press A
A = 24, then E.
So, you are travelling at 1034.9 miles/hour. That is fast!