163 Calc
To calculate the natural log (base e) of a number:
• Tap ln, then enter the number. Press =.
To calculate e to a given power:
• Tap ex, then enter the value you want to find e to the power of. Press =.
The Scientific calculator can display numbers in the following formats:
• Normal: this is adequate for most calculations. Numbers are displayed
in standard notation to 12 significant figures, with decimal places and
an exponent as required.
• Fixed: this format always displays results with a specified number of
decimal places, e.g. for currency calculations.
• Scientific: you may find this useful for dealing with very large or very
small numbers. Numbers are displayed as a single digit to the left of
the decimal point, a specified number of significant figures, and then
an exponent.
To change the number format:
• On the Tools menu, select the command. If you choose Fixed or
Scientific, you can set the number of decimal places or significant
figures to be displayed.
Exponent notation
You can express very large and very small numbers more succinctly using
positive and negative exponents. For example, 57 200 000 can be expressed as
5.72E7.
To express a number as an exponent:
1. Enter the first part of the number, normally as a decimal fraction.
2. Tap exp. An ‘E’ will appear on the calculation line. To express a very
small number, tap +/- to insert a minus sign before the second number.
3. Enter the number of decimal places that the first number needs to be
moved to the left.
DISPLAYING NUMBERS
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