HP 30b HP 20b Business Consultant and HP 30b Business Professional User's Guid - Page 19

Mathematical Calculations, Number Entry and Display - scientific

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2 Mathematical Calculations Mathematical Functions Mathematical functions are located: +-*/ • On keys, such as, , etc. :p • On shifted, or secondary functions, such as, :s • In the Math menu, Number Entry and Display Numbers are entered by pressing: 0-9 • Numbered keys, . • The decimal point } • The key :w • The keys { { To correct a number entry, press the backspace key, . Each press of erases the last digit or symbol you entered. To enter a number in the display, press the number digits successively. A number can have up to 12 digits. } To change the sign of a number from positive to negative, press . Use scientific notation to enter very large and very small numbers. For example, to enter the number 1.23x 10127 in scientific notation, first enter the mantissa (1.23) and then press :w and enter the number (127) representing the exponent. The exponent must have a value between -499 and +499. If an expression has more than 12 digits, or if an operation returns a result with more than 12 digits, the calculator automatically displays scientific notation. Figure 1 Scientific Notation in FIX=2 Mode Mathematical Calculations 11

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Mathematical Calculations
11
2
Mathematical Calculations
Mathematical Functions
Mathematical functions are located:
•
On keys, such as,
+-*/
, etc.
•
On shifted, or secondary functions, such as,
:p
•
In the Math menu
,
:s
Number Entry and Display
Numbers are entered by pressing:
•
Numbered keys,
0
–
9
•
The decimal point
.
•
The
}
key
•
The
:w
keys
To correct a number entry, press the backspace key,
{
. Each press of
{
erases the last
digit or symbol you entered.
To enter a number in the display, press the number digits successively. A number can have up
to 12 digits.
To change the sign of a number from positive to negative, press
}
.
Use scientific notation to enter very large and very small numbers. For example, to enter the
number 1.23x 10
127
in scientific notation, first enter the mantissa (
1.23
) and then press
:w
and enter the number (
127
) representing the exponent. The exponent must have a
value between –499 and +499. If an expression has more than 12 digits, or if an operation
returns a result with more than 12 digits, the calculator automatically displays scientific
notation.
Figure 1
Scientific Notation in FIX=2 Mode