Chain Calculations - HP 25 Owner's Handbook Manual

18 Getting Started
So , D means square root of the displayed number ,[K] mean s
I
. , etc.
displayed number
Thus, to calculate 3
6
:
Press Display
1 3.
13.00
3
Imim
6
16.
X, the displayed number , is now 6.
16.
o
1729.00
The answer.
N ow try the following problems using the
0
key, keeping in
mind the simple rules for two-number functions:
16
4
812
225 5
(16 to the 4th power)
=
165536.00
(81 sq uared)
16561 .00
(Square root of 225)
115.00
2
16
(2 to the 16th power)
=
I
65536.00
16
25
(4th root of 16)
, - I
2 _.0 _ 0 _ _ -'
Chain Calculations
(You could
also have
done this as a
one-number
function
using 0 ·)
(You could
also have
done this as a
one-number
function by
usingD ·)
The speed and simplicity of operation of the HP-25 's Hewlett-
Packard logic system become most apparent during chain cal- .
culations. Even during the longest of calculations, you still per-
form only one operation at a tim e,
and you see the results as you
calculate-the Hewlett-Packard automatic memory stack
stores up to four intermediate results inside the calculator until
you need them , then inserts them into the calculation. This