The sum of logs = the log of the product .
log(5) + log(2) = log(5·2) = log(10)
If these are all logs to the base 10, then log(10) = 1
log(5) + log(2) = 1
Let's try it out !
According to my calculator ...
log(5) = 0.69897...
log(2) = 0.30103...
Log(5) + log(2) = 0.99999... yay ! not bad
