HP -20S Owner's Manual page 12

Scientific calculator
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Arithmetic Operators. The following examples demonstrate using
the arithmetic operators [(+], (-], (x], (+], and
(exponentiation)*.
Keys:
Display:
Description:
24.715
62.471 (=]
87.1860
Adds 24.715 and
62.471.
When a calculation has been completed (by pressing (=]), pressing a
number key starts a new calculation:
19
12.68 (=]
240.9200
Calculates 19 x 12.68.
is the exponentiation operator:
4.7
3(=)
103.8230
Calculates 4.75.
If you press an operator key after completing a calculation, the cal-
culation is continued:
115.5
115.5_
Continues the
calculation.
(=)
219.3230
Completes the calcula-
tion of 4.73 + 115.5.
You can do chain calculations without using (=] after each step. Calcu-
late 6.9 X 5.35 + 0.918:
6.9
5.35 [+]
36.9150
Pressing [+] displays
the intermediate an-
swer, showing result of
6.9 X 5.35.
918
0.918_
Continues the
calculation.
(=)
40.2124
Completes the
calculation.
*If you press more than one operator, for example
(+][=]
(+], all are ignored except
the last one.
10
1: Getting Started

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