Here is an example

antilog(-5.04)

The digits before the decimal becomes the mantissa.

antilog(-5.4)

Characteristic=5

Mantissa=0.4

To find the value of antilog negative value..

- Ignore the negative sign.
- Add one to the characteristic and write it in the negative power of 10. i.e. 10
^{-6} - substrate characteristic from 1 and write it in the multiple of 10
^{-6}.

we get..

(1-0.4)x 10^{-(5+1)}

=0.6 x 10^{-6}

Add we will look for the value in 0.60^{th} row, 0^{th} column of the antilog table, which is 3989.

Therefore, antilog(-5.4)=3.989 x10^{-6}

To learn how to calculate log and antilog , you can refer to the following link also..

http://www.meritnation.com/discuss/question/2351485

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