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34
TH
K YBOARD
ARITHMETIC KEYS
The following example includes the use of all four arithmetic
keys; the calculation is performed by two methods to show how
ste ps ca n be saved.
EXAMPLE:
STEP
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
(3 X 4)
~
(8
-
9)
(8 X 2)
-
6
==
1
·
1
Method I -
(a)
starttng with the
numerator,
solve separ-
ately for the quantities in parentheses, add
them and store the result;
(b)
solve the denominator in the same way;
(c)
recall the
numerat
or and divide.
SWITCH:
FIXED POINT
SET: DECIMAL
DIGITS
to
5
J
J
DISPLAY
REG ISTERS
KEY
X
y
z
NOTES
CLEAR
0
0
0
3
3
0
0
t
3
3
0
4
4
3
0
X
4
12
0
(3x4)
~y
ROLL
'f'
0
4
12
Sto
re · ,
n Z
8
8
4
12
x:,y
4
8 12
.
-
9
9
8
12
9
-
1 12
(8
9)
~
Y
t
-
1 12 12
reca II
(3x4)
+
-
1 11
12
(3x4)
+ (8- 9)
~
Y
ROLL
'f'
12
-
1 11
Store tn Z
8
8
-
1 11
x :,y
-
1
8 11
2
2
8 11
X
2 16 11
(8
X
2)
~
Y
6
6 16 11
-
6 10 11
(8x2)
-
6
~
Y
ROLL
t
10 11
6
reca II (3x4)
+
(8-
9)
......
(3x4)
+
(8 9)
=
1 . 1
~y
•
10
1.1
6
-
(8x2)
-
6
•
•
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