HP 25 User Manual

30 Controlling the Display
However, multiplying again by 10 causes the exponent to shift
to
another multiple of three and the decimal point to move to the
units position:
Press
100
Display
I
L
1 :..: . ::.- 23 "-- __ - =c
03
:o.-J1 Decimal point shifts. Power of
I 0 shifts to 10 - :) .
Automatic Display Switching
The HP-25 switches the display from fixed point notation to full
scientific
notation (SC I 7) whenever the number is too large or
too small to be seen with a fixed decimal point. This feature
keeps you from missing unexpectedly large or small a nswer s.
For example , if you try to solve (.05)3 in normal FIX 2 display ,
the
answer is automatically shown in scientific notation:
Press
-
D !£iKJ 2
.051mmJ
3D CZl
Display
1 0.00 00 1 ENG 0 from previous example.
1~ 0 = .0 = 0 ~==~1 Normal FIX 2 display.
1 0. 05 1
1 1.2500000-04 1 Display a utomatically switched
to SCI 7 to show answer.
Another way of displaying the a nswer would be 0.000125, but in
normal FIX 2 display, you would have seen only I 0.00 I dis-
played .
After automatically switching from fixed to scientific, when a
new number is keyed in or _ is pre ss ed the display au to -
matically reverts back to the fixed point display originally
selected .
The H P-25 also switches to scientific notation if the answer is
too large (> 1010) for fixed point display . The display will not
switch from fixed if you solve 1582000 x 1842:
Press Display
1582000 ImIm "1 1 '--- 5 ~ 82 "- 0 - 0 --'- 0. -'- 0 - 0 -~
1842 0 1 2914044000. 1 Fixed decimal point display.
However, if you multiply the result by 10 , the a nswer is too
large for fixed point notation, and switches automatically to
scientific
notation:

HP 25 Specifications

General

Power Source	Rechargeable battery pack
Programming Steps	49
Release Year	1975
Functions	Trigonometric, logarithmic, statistical
Type	Scientific
Dimensions	148 x 80 x 14 mm