HP (Hewlett-Packard) Calculator HP 12C Financial Calculator User Manual

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Section 7: Mathematics and Number-Alteration Functions 101
File name: hp 12c pt_user's guide_English_HDPMF123E27 Page: 101 of 275
Printed Date: 2005/8/1 Dimension: 14.8 cm x 21 cm
Integer.
Pressing
gÑ
replaces the number in the display by its integer
portion — that is, it replaces each digit to the right of the decimal point by 0. The
number is changed inside the calculator as well as in the display. In RPN mode,
the original number can be recalled to the display by pressing
gF
.
Fractional.
Pressing
gT
replaces the number in the display by its fractional
portion — that is, it replaces all digits to the left of the decimal point by 0. Like
gÑ
,
gT
changes the number inside the calculator as well as its displayed
version. In RPN mode, the original number can be recalled to the display by
pressing
gF
.
All of the above functions are used basically in the same way. For example, to find
the reciprocal of 0.258:
Keystrokes Display
.258
0.258
Keys the number into the display.
y
3.88
The reciprocal of 0.258, the
original number.
Any of the above functions can be done with a number in the display resulting
from a previous calculation, as well as with a number you have just keyed in. The
examples below indicate how
gF
can recall the original number for further
use in RPN mode.
Keystrokes
(RPN mode)
Display
f
CLEAR
X
3875968992
Displays all 10 digits of the number
inside the calculator.
3.88
Display returns to normal format
when
X
key is released.
fB
3.88
The number now in the display
appears the same as before, but …
f
CLEAR
X
3880000000
Displaying all 10 digits of the
number inside the calculator shows
fB
has changed the number to
match its displayed version.
3.88
Display returns to normal format.
gÑ
3.00
The integer portion of the number
previously displayed.
gF
3.88
Recalls the original number to the
display in RPN mode only.
gT
0.88
The fractional portion of the number
previously displayed.

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