18.6 → 19
If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up (+1).
If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down (no change).
18. 6 ≈ 19.0 ** =**** 19**
When rounding 18.6 to the nearest tenth, we look at the hundredths place, which is 0. Since 0 is less than 5, we keep the tenths place as 6. Thus, 18.6 rounded to the nearest tenth is 18.6.
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