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84 Section 7: Mathematics and Number-Alteration Functions
File name: hp 12c_user's guide_English_HDPMBF12E44 Page: 84 of 209
Printered Date: 2005/7/29 Dimension: 14.8 cm x 21 cm
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
Ñ
,
T
changes the number inside the calculator as well as its displayed
version. 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 ori
g
inal
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.
Keystrokes Display
fCLEARX
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 …
fX
3880000000
Displaying all 10 digits of the
number inside the calculator shows
B
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.
gT
0.88
The fractional portion of the number
previously displayed.