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22
CHAPTER 2
Manual Operations
In addition to the calculations as shown above, algebraic calculations using varia-
bles are possible
with
this computer.
These
calculations
are
convenient when a
certain value is used repeatedly.
For
example:
3x+5=
4x+6=
5x+7=
If the value of
x
in the
above calculations
is 123.456, it is troublesome
to
press
the same numeral keys repeatedly.
A
labor-saving method for such calculations
is algebraic calculation using a variable.
Use variable X.
First assign 123 .456 to the variable
X.
CKJ@) 1 2 3
•
4 5 6
~
Where@)
does not mean
"equal,"
but
"assignment of
the
right side
to the left
side."
Now start calculation
.
300CKIGJ 5
~
400CKIGJ 6
~
5 OOCKIGJ 7
~
375
~
.36B
Repetitive calculations can be made as simple
as
this when a
variable
is used
.
This computer has
26
variables from
A
to Z, which makes possible
storage of
numerous
values.
In the
above
example
,
the value
of the
variable X
is
constant
while
calculation
I
formulas differ.
Please
note~
in
a
calculation where
formulas
are constant and the value of the
variable differs the
computer
works in
a
different way. For
example
,
in
a calcula-
tion of a formula
3 x
+
5 =where
x
varies from 123 to 456 to 789
the
computer
uses
a
function to store numeric expressions
(calculation formulas).
This
will be
described in Chapter
3.
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