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HP HP-25 User Manual
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Press
Display
10
[x]
2.9140440
10
|Scientific
notation
display.
Notice
that
automatic
switching
is
between
fixed
and
scientific
notation
display
modes
only—engineering
notation
display
must
be
selected
from
the
keyboard.
Keying
in
Exponents
of
Ten
You
can
key
in
numbers
multiplied
by
powers
of
10
by
pressing
B33
(enter
exponent
of
ten).
For
example,
to
key
in
15.6
trillion
(15.6
X
10'2),
and
multiply
it
by
25:
Press
Display
15.6
EEX
15.6
00
12
(This
means
15.6
x
10'2.)
Now
Press
Display
1.5600000
13
25
[x]
3.9000000
14
You
can
save
time
when
keying
in
exact
powers
of
10
by
merely
pressing
[F34
and
then
pressing
the
desired
power
of
10.
For
example,
key
in
1
million
(10%)
and
divide
by
52.
Press
Display
EEX]
1.
00
Youdo
nothave
tokey
in
the
number
|
before
pressing
=3
when
the
number
is
an
exact
power
of
10.
6
1000000.00
Since
you
have
not
specified
scientific
notation,
the
answer
reverts
to
fixed
point
notation
when
you
press
:
He
To
see
your
answer
in
scientific
notation
with
six
decimal
places:
Press
Display
[
[sc]e
1.923077
04
34
36
Table of Contents
Table of Contents
4
Function Key Index
7
The HP-25 Programmable Scientific Calculator
9
Memory
10
Programming Key Index
10
The HP-25 Means Painless Programming
13
Manual Problem Solving
13
Programmed Problem Solving
14
Section 1: Getting Started
17
Display
17
Keyboard
17
Keying in Numbers
18
Negative Numbers
18
Clearing
19
Functions
19
Chain Calculations
22
A Word Aboutthe HP-25
26
Section 2: Controlling the Display
29
Display Control Keys
29
Automatic Display Switching
34
Keying in Exponents of Ten
35
Calculator Overflow
37
Error Display
37
Section 3: the Automatic Memory Stack
39
The Stack
39
Initial Display
39
Manipulating Stack Contents
39
Clearing the Stack
41
The KBY Oo
42
One-Number Functions and the Stack
44
Two-Number Functions and the Stack
44
Chain Arithmetic
46
Order of Execution
49
Constant Arithmetic
50
Section 4: Function Keys
53
Last X
54
Prefix Clear
54
Number Alteration Keys
55
Reciprocals
56
Square ROOS
56
SQUANING " O
57
Using Pi
57
Percentages
58
Storage Registers
59
Trigonometric Functions
63
Polar/Rectangular Coordinate Conversion
66
Logarithmic and Exponential Functions
67
Statistical Functions
70
Vector Summations
74
Section 5: Programming
77
What Isa Program
77
Why Write Programs
77
Three Modes of Operation
78
Introductory Program
79
Running a Program
82
Gto 00
82
Writing a Second Program
83
Interrupting Program Execution
86
Branching
91
Editing a Program
95
Program Applications
101
Afterword
103
Appendix A: Accessories, Service, and Maintenance
105
Standard Accessories
105
Optional Accessories
105
AC Line Operation
105
Battery Charging
106
Battery Operation
107
Battery Pack Replacement
108
Service
109
Temperature Range
110
Warranty
110
Appendix B: Improper Operations
113
Appendix C: Stack Lift and LAST X
115
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HP HP-25 Specifications
General
Brand
HP
Model
HP-25
Category
Calculator
Language
English
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