Convert 15.9 mm to its equivalent in km?

Answer 1

Here's how I would do it. 1 mm = 10^-3 m, therefore 15.9mm= 15.9*10^-3m or (with better format) 1.59^10-2m. 1km = 10^3 m. Therefore 15.9mm = 1.59*10^-2 m/10^3 m/km = 1.59*10^-5 km.

Answer 2

15.9 mm is equivalent to 0.0000159 km.

Answer 3

15.9 / 1 000 000 = 0.000 0159