Casio FX-795P - 2-3 Calculation Notes; Priority Sequence in Calculation; Number of Input;Output Digits and Calculation Digits

CHAPTER 2 Manual Operations
ee eum
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£+55
4x47+6=
S5x2+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.
YE 123.456 &
Where
J
does
not
mean
“equal,”
but
“assignment
of
the
right
side
to
the
left
side.”
Now
start
calculation.
3@)GI4) 5 &?
4@)R04) 6 be
5 QOH 7 &s
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
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.
2-3 Calculation Notes
= Priority Sequence in Calculation
As mentioned in the preceding section, calculations are subject to the rule of
“priority sequence” (true algebraic logic) which requires that multiplication and
division take precedence over addition and subtraction. This computer auto-
matically judges the priority sequence. You simply input a numeric expression
and the correct answer will be displayed.
Here is the priority sequence in a calculation:
1) Functions (sin, cos, tan, etc.)
2) Power (t)
3) Multiplication (R), division (/)
4) Addition (+), subtraction (-)
Calculations are performed according to this priority sequence. When calcula-
tions happen to be equal in the priority sequence, priority is given to the calcula-
tion on the left. If there are parentheses, top priority should be given to the
parenthesized calculation.
Example:
2+3*
S1N(17+13)
t2=2.75
L_@—
®
®
@
® J
=
Number
of
Input/Output
Digits
and
Calculation
Digits
The
range
of
input
values
(number
of
input
digits)
acceptable
to
this
computer
is
12
digits
for
a
mantissa
and
2
digits
for
an
exponent.
The
same
number
of
digits
apply
to
internal
calculations.
The
displayed
range
of
a
value
(number
of
output:
digits)
is
10
digits
for
a
mantissa
and
2
digits
for.an
exponent.
Example:
10J23456789126
12345678912@ 100
12345678912@H—-100&
g z
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