I have an array of values like `[0.75, 0.0050000000000000001, 0.0050000000000000001, 0.0050000000000000001, 0.0050000000000000001, 0.0050000000000000001, 0.0040000000000000001, ...]` and I need to remove the duplicates. I only want to focus on the first 3 digits after the decimal point. How do I do this?