84 Section 7: Mathematics and Number-Alteration Functions

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

.258

y

Display

 

0.258

Keys the number into the display.

3.88The 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.

Keystrokes

Display

 

fCLEARX

3875968992

Displays all 10 digits of the number

 

 

inside the calculator.

 

3.88

Display returns to normal format

 

 

when Xkey 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

 

 

Bhas changed the number to

 

3.88

match its displayed version.

 

Display returns to normal format.

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.

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