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(fraction) key. For example, to see the fractional por-
tion of 123.456 used above:
Press
Display
123.456
Bl (Frac
Only the fractional portion of the
number
is
displayed,
rounded
here to normal FIX 2 display.
When 7]
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 displayed X-
register, then press [}
. For example, to calculate the recip-
rocal of 25:
Press
Display
256
You can also calculate the reciprocal of a value in a previous
calculation without reentering the number. For example, to
calculate
1
1/3+1/6
Press
Display
300
Reciprocal of 3.
6
Reciprocal of 6.
Sum of reciprocals.
B
Reciprocal of sum.
Square Roots
To calculate the square root of a number in the displayed
X-register, press[
. For example, to find the square root
of 16:
Press
Display
16 =]
To find the square root of the result:
Press
Display
nz
[20
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