What is 0.84 to the nearest tenth?

Well, isn't that a happy little question! When we're looking at 0.84 and trying to find its nearest tenth, we see that the digit in the tenths place is 8. Since the digit right after it is 4, which is less than 5, we round down. So, 0.84 to the nearest tenth is 0.8. Just a little adjustment, and we have a perfectly rounded number!