How to press the value of log, to evaluate log, to find the unknown log using EL-531WH, advance D.A.L

Answer 1

I have a very old DAL, a EL-509VH,

but they should work the same way.

to take log 35
I enter:
log
35
=

to get 1.544....

some calculators require you to enter the number , then pressing the log.