2 mathematical calculations, Number entry and display, Mathematical functions – HP 20B User Manual
Page 16
Mathematical Calculations
16
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
127
10
23
.
1
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.
Figure 1 Scientific Notation in FIX=2 Mode