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Section 5: Floating-Point Numbers
e The complement mode functions remain active, but will not
affect the arithmetic functions or number representations. The
complement mode will affect the conversion of the X-register
when the calculator returns to Integer mode.
Digit Entry and Other Display Formats
Changing Signs. Pressing
(change sign) will reverse the
sign of the displayed number. To key in a negative number, press
after its digits have been keyed in. This does not terminate
digit entry in Floating Point mode.
Scientific Notation. Pressing
(-] sets Floating Point
mode and sets scientific notation display format. Numbers will be
displayed with six decimal places.
Exponents. Numbers with exponents are entered using
(enter exponent). First key in the mantissa, then press
and
key in the exponent. (For a negative mantissa, press
before
pressing [EEX].) For a negative exponent, press
after keying in
the exponent.
Digits from the mantissa that spill into the exponent field will
disappear from the display when
is pressed but will be
retained internally.*
Mantissa Display. Regardless of the display format in Floating-
Point Decimal mode, the calculator internally represents each
number as a 10-digit mantissa with a two-digit exponent of 10. If
you want to view the full 10-digit mantissa of a number in the
X-register, press
CLEAR [PREFIX]. The full mantissa will be
displayed as long as the
key is held down.
Keystrokes
Display
([STATUS]: 2-56-0000)
(f](FLOAT]3
45 9]
6.708
(f]CLEAR
(hold)
6708203932
(release)
6.708
*To prevent a misleading display,
will not operate with a number having more than
seven digits to the left of the decimal point, nor with a mantissa smaller than 0.000001.
To key in such a number, use a form having a greater exponent value (whether positive
or negative).
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