How to calculate antilogarithm mentally

[Kinma]

Yes, there is.

I wrote a long post about how to calculate the antilog of 0.1, 0.2, 0.3, etc here:

Calculating 10 ^ 0.1 , 0.2, 0.3, etc

We talked about mentally calculating logarithms. Now, let’s go the other way. How does one mentally calculate 100.1, 100.2, etc.? You could of course memorize the numbers, but this is the mental calculation subforum, so we need to calculate them. Mentally. Ouch. Think about it; how would you calculate 100.1? It is - by definition - the tenth root of 10, so one option is to try a number and raise that to the tenth power - for example by repeatedly squaring. And then iteratively refine the i…