HP 20b HP 20b Calculator Quick Start Guide - Page 25

One-Number Functions and the Math Menu

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Mathematical Calculations Table 2-2 Simple Arithmetic Calculations in RPN Mode Keys * = Display Description Continues the operation with the displayed results. Validates the final result of 77. Note the absence of the (*) annunciator. One-Number Functions and the Math Menu The key presses for the one-number mathematical functions listed in Table 2-3 below apply to all modes, Chain, Algebraic, and RPN. To execute one-number functions: 1. Key in a number, x , into the display. 2. Press the key or key combination corresponding to the operation you wish to execute. The results are displayed on the bottom line. For example, to calculate 6 , press 6:n. A result of 2.45 is calculated immediately and displays on the bottom line. The symbol appears on the top line. 25

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Mathematical Calculations
25
Table 2-2
Simple Arithmetic Calculations in RPN Mode
Keys
Display
Description
*
Continues the operation with the
displayed results.
=
Validates the final result of 77.
Note the absence of the
(
*
)
annunciator.
One-Number Functions and the Math Menu
The key presses for the one-number mathematical functions listed in Table 2-3
below apply to all modes, Chain, Algebraic, and RPN. To execute one-number
functions:
1.
Key in a number,
x
, into the display.
2.
Press the key or key combination corresponding to the operation you
wish to execute. The results are displayed on the bottom line.
For example, to calculate
6
, press
6:n
.
A result of
2.45
is
calculated immediately and displays on the bottom line. The
symbol appears
on the top line.