Chain Calculations - HP -32S Owner's Manual

Chain Calculations
The speed and simplicityof calculating with the HP-32S are apparent
during chain calculations (that is, calculations with more than one op
eration). Even during the longest of calculations, you still work with
only one or two numbers at a time—the automatic memory stack stores
intermediate results until you need them, then it inserts them into the
calculation.*
• This method requires fewer keystrokes than other calculator logic
does, and it adapts itself naturally to programming.
• The process of working through a problem is the same as working
it out on paper, but the calculator does the hard part.
For example, solve (12 + 3) x 7.
Work From the Parentheses Out. If you were working this prob
lem out on paper, you would first calculate the intermediate result of
(12 + 3)...
15
(12-i=-3) x 7 =
.. .and then you would multiply the intermediate result by 7.
15 x 7 = 105
Solve the problem in the same way on the HP-32S, starting inside the
parentheses.
Keys: Display: Description:
12 I enter I 3 |T| 15.0000 Calculates the interme
diate result first.
You don't need to press Ienter Ito save this intermediate result before
proceeding. Since it is a calculated result, it is saved automatically.
* Don't worry now about the automatic (RPN) memory stack and how it works. The stack is
explained in chapter 2.
26 1: Getting Started