Keys Used To Manipulate The Rpn Stack; Algebraic Mode; Chain Mode - HP 30b - Business Professional Calculator Quick Start Manual

Keys Used to Manipulate the RPN Stack

(
• Press
the key. A roll down moves the numbers in each register down one
level, and the number in the bottom register moves up to the top of the
stack.
D
• Press to perform a swap of the stack. Note the small symbol on the
key. A swap operation exchanges the numbers of the X and Y registers
of the stack.
• If no menu is selected, the
>
and the

Algebraic Mode

To perform the same example in Table 1-2 in Algebraic mode, use parenthe-
ses to set the order of operation, and key in the expression as it is written
from left to right. Press
the operating mode to Algebraic. The message on screen, Algebraic , con-
firms your choice. Press
J
(3+4D*(5+6D
press:
Note the expression displays on screen in the order in which it is keyed.
=
Press to return a result of 77.00.

Chain Mode

To perform the same example in Chain mode, use parentheses to set the
order of operation as you did in Algebraic mode. Calculations in Chain
mode are interpreted in the order in which they are entered. If you press an
+-/*
operation key,
continued using the currently displayed value. Use parentheses to set the
14 Getting Started
to perform a roll down of the stack. Note the small arrow on
<
key performs the swap operation.
:u<
O
to return to the default calculator screen, then
key performs the roll down operation,
(five times) followed by
=
, after pressing
I
to set
K
, the calculation is