What is 30.089 to the nearest tenth?

Well,

Look at the number in the hundredth's place.

If the number is greater than or equal to 5, round up. Otherwise, round down.

30.089

8 is greater than or equal to 5, so we round up.

30.089 - - > 30.1

The tenth is 0.0

The hundredth is 0.00

The thousandth is 0.000

30.089

Take away everything up to the number before the tenth (you only need that number to round)

30.08

Round up - - 08--->1

30.1 is your final answer