Round 54.5123 to the nearest thousandth

54.5123 rounded to the nearest thousandth is 54.512.

Your thousandth place is 2. So 54.51 (2) 3 and if you round it to the nearest tenth you need to look at the number behind the 2. Since 3 is lower than 5 your answer will be 54.512 or if you want you can add the zero 54.5120