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6
T E KEYBOARD
ARITHM TIC KEYS
DISPLAY
REGISTERS
STEP
KEY
X
y
z
NOTES
14
-
6
10 11
(8x2)-6
~y
15
"'
10 11
11
recall (3x4)+ (8-9)
16
•
10
(3x4)+(8-
9)
_
1 1
-
1.1
11
~
y
•
(8x2)-
6
-
·
The following example
illustrates an accumulative process us-
ing
the
arithmetic
keys; the
t
and ~ keys allow temporary
storage and
recall of the accumulative total.
The sum of
the products, n
1
n
2
+
n
3
n
4
+n
5
n6
+
--- ·
etc., is
Used
in
th1s example; however, this
'program' is
particu-
•
larly
important as
it
can be easily adapted to
solve
other expres-
sions
(such
as product of t he sums) as is shown following the
program.
STEP
KEY
NOTES
1
Enter
n
1
use any digits for n
2
t
3
Enter
n
2
-
-
4
X
(n
1
n
2)
~
y
5
Enter n
3
6
t
(n
1
n
2
)
st ored
in
Z
7
Enter n
4
8
X
(n
3
n
4
)
~Y
9
t
recall
(n
1
n
2 )
10
+
(n
1
n
2
)
+
(n
3
n
4
)
~ Y
11
Entern
5
12
t
(n
1
n
2)
+
(n
3
n
4)
sto red in Z
13
Entern
6
14
X
(n
5
n
6
)
~
y
15
t
recal
l
(n
1
n
2
)
+
(n
3
n
4)
16
+
(n
1
n
2
)
+
(n
3
n
4
)
+
(n
5
n
s)
~y
17
tnter n
7
. · · - -
etc.
- - - - -
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