HP 20B manual Mathematical Calculations, Mathematical Functions, Number Entry and Display

1.23 10127

Mathematical Calculations

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 :wkeys

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 numberin scientific

notation, first enter the mantissa (1.23 ) and then press :wand 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

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