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52
Function Keys
I
FRAC
I
(frac
tion)
key. For example,
to
see
the fractional
por-
tion
of 123.456
used
abo
!:e:
Press
Display
123.456
123.456
m
I
FRAC
I
0.46
Only
the fraction
a
l portion
of the
number is di
s
played
,
rounded
here to normal
FI
X 2 displ
a
y.
When
m
~
is pressed,
the integer portion
of
the number
is
lost.
The
entire
number,
of course, is
preserved in the
LAST X
register
.
Reciprocals
To
calculate
the
reciprocal
of
a
number in the
dis
pl ayed
X-
register
,
then press
moo
.
For example,
to
calculate
the recip-
rocalof25:
Press
Display
25
m
00
1L. . . : . . :
0
.--=-
04
- '---_--'
You
can also calculate
the
reciprocal of a value
in
a previous
calcul
a
tion without reentering the number. For
ex
a
mple
,
to
calcul ate
113
+
1/6
Press
Display
3
moo
0.33
Reciprocalof3
.
6
moo
0.17
Reciprocalof6
.
[±J
0.50
Sum
of
reciproc als.
moo
I
2.00
Reciprocal
of sum.
Square Roots
To
calculate
the
square root of
a
number in the
displayed
X-regi ster
,
pre
ss
D
[ill
.
For
example,
to
find
the square
roo
t
of
16:
Press
Display
16
D
[ill
"---.:
4.-'--
00
=
---_--'
To
find the
square root of
the result:
Press
Display
D
I
f f
I
L I
2
---' -
.0
- '--'
0
'----_---"
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