99.999 rounded to the nearest tenth would be?

100.0

Step-by-step explanation:

Tenths is the first place after the decimal

We will look at the second place after the decimal to see if we need to round up

It is a 9 we will round the tenths place up

The tenths place is a 9 so we have to round that up to 10

99 becomes 100

100.0

Look at the place after the tenths, it is more than 5.

99.999

So add + 1 to the tenths place.

Rounded to the nearest tenth would be:

100.0