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).
2.012** 4 ** ≈ 2.012
Place of the thousandth digit in 2.01** 2 **4 is the second 2. After rounding it to the nearest thousandths we'll get 2.012 . It's because 2.0124 is closer to 2.012 than to 2.013.
To round 2.0124 to the nearest thousandth, you look at the digit in the ten-thousandths place, which is 4. Since 4 is less than 5, you do not round up. Therefore, the rounded number is 2.012.
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