6 millimeters is already rounded to the nearest thousandth of a millimeter.
For example to round 1.465 to the nearest hundredth you look at the thousandth (5) if it is bigger than 5 then you round the hundredth (6) to 7. So your example answer would be 1.47
8.660
one-sixth as decimal nearest thousandth = 0.1671/6:= 1÷ 6= 0.167 in decimal
17.856 rounded to the nearest hundredth is 17.86. The digit to the right of the hundredth is the thousandth. When rounding anything less than five you round down. When rounding anything five or more you round up. The thousandth digit is 6, which is more than 5, so you round up, making the answer 17.860 or 17.86.
5.159
For example to round 1.465 to the nearest hundredth you look at the thousandth (5) if it is bigger than 5 then you round the hundredth (6) to 7. So your example answer would be 1.47
look at the thousandth place which is 6 and since 6 is greater than 5 you round 8 up 1 so it would be 8.09
8.660
To the nearest cent would be to the nearest hundredth. Since 4 is the hundredth place and 6 is the thousandth plae, we can round 4 to 5 and everything to the right of it 0. The answer would be 4892.05 or $4892.05
one-sixth as decimal nearest thousandth = 0.1671/6:= 1÷ 6= 0.167 in decimal
17.856 rounded to the nearest hundredth is 17.86. The digit to the right of the hundredth is the thousandth. When rounding anything less than five you round down. When rounding anything five or more you round up. The thousandth digit is 6, which is more than 5, so you round up, making the answer 17.860 or 17.86.
5.159
2.000
Look at the thousandths place. It is a 4. Now look at the ten thousandths place. It is a 6. The 6 is more than half the way to 10; so round the 4 up to a 5. Answer: 2.035
31.60
That depend upon what you are rounding to: To the nearest thousandth, 6.048 → 6.048 To the nearest hundredth, 6.048 → 6.05 To the nearest tenth, 6.048 → 6.0 To the nearest whole number, 6.048 → 6 To the nearest 2, 6.048 → 6 To the nearest 3, 6.048 → 6 To the nearest 4, 60.48 → 8 To the nearest 5, 6.048 → 5 To the nearest 6, 6.048 → 6 To the nearest 10, 6.048 → 10 To the nearest 12, 6.048 → 12 To the nearest 13 (or higher) 6.048 → 0
6.39 6 unit 3 tenth 8 hundredth 7 thousandth 7 is closer to 10 than to 0 so round up then the 8 becomes 9