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Chapter 3: Manual Calculations
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 travelling
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!