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Fundamental Operations
Operations
common
to a number
of
applications
are
defined in the
following paragraphs; they
are
described in depth in Appendixes
A
and B.
Entering Data
Numbers appear from
left
to right
on
the display in
the
order in
which
they were pressed
.
Note that
a decimal point is included
with
the
number
entry keys;
it must be
entered
if it
is
part
of the
number.
For
example, $2.98 would
be
keyed
as:0
[J
~ ~.
Each time a number is pressed it
appears
on the
display.
To signal
that
you have completed entry
of a
number
string,
press the non-
numeral key
appropriate
to
your present calculation.
If
you
want
to
enter
a very large number-say 1 trillion-press
1000000000000.
T he
number is
displayed as
_
.
This represents 1
X
10 raised to the 12th power-an example
of
scientific
notation where
large
numbers appear in an
abbreviated
form
using an exponent of lOin
the
last
two digits displayed.
Entering Negative Numbers
To enter a negative
number,
press
CHS
(change
sign
key)
after entering
a
positive
number.
The number
will
appear
on the display preceded
by a minus (-)
sign.
To change the
sign
of a negative
or
positive
num-
ber on the display press
CHS
•
Rounding Numbers
A
secondary
function of all numeral keys is the rounding of displayed
numbers. Numbers may
be
rounded
on the
display to
a
maximum of
six
decimal places by pressing the
gold
key
.
before pressing the
appropriate number key
(0-6).
Rounding affects the display only;
it
does not affect the
accuracy
of the number internally.
Numbers
may
be displayed
in
scientific notation by pressing
.
and
then
pressing
the 7, 8 or 9.
Loading Data
All
calculations
performed
on
more than one number require that
numbers be
loaded
into appropriate memory locations.
Arithmetic and Basic Functions
When performing
arithmetic
and basic functions, the first
number
in
each set of values is
loaded by
pressing
SAVE
+
after
entering
the
num-
13
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