Round off 29.05 to one decimal place.

29.1 , if the next number less than 5 , it rounds to 0 , but if the next place number is 5 or more than 5 , it rounds to 10 , so the previous place plus 1 .

29.05.
Rounding up to one decimal.
After the one decimal place, we look at the next number after and see if it is up to 5 and above.
If it is 5 and above, we add 1 to next  and if it is not we don't.
In this case, it is up to 5, we add 1 to 0 one the one decimal place.

So answer is 29.1 to one decimal place.

Cheers.