How do I convert 150,000,000 mm to km?

http://www.onlineconversion.com/length_metric.htm

150 000 000 millimeter = 150 kilometer (you actually end up dividing by 1 million)
There's 1000mm in a meter, there's 1000m in a km
1000 x1000 = 1,000,000, divided into 150,000,000 = 150 km

150,000,000mm X (1 m / 1000 mm) X (1km / 1000m) = 150 km

150,000,000 mm / 1000 mm/m = 150,000 m
150,000 m / 1000 m/km = 150 km

or

150,000,000 mm * 0.001 m/mm = 150,000 m
150,000 m * 0.001 km/m = 150 km

or

150,000,000 mm / 1,000,000 mm/km = 150 km

Divide by 1,000,000.

So 150,000,000 mm = 150 Km

1000mm=1m
1000m=1Km

1 km = 1000 m = 1000 m * 1000 mm = 1000000 mm
1 mm = 1/1000000 km
150000000 mm = 150000000/1000000 km = 150 km

150,000,000 mm = 150,000,000/1,000,000 km = 150 km

150 000 000 mm / 10

=15 000 000 cm /100
= 150 000 m / 1000
= 150 km

its 150 km..
Km Hm Dm m dm cm mm
15 0 0 0 0 0 0 0

Try google: "Convert 1500000000mm to km"

But really you should do this yourself.

Convert mm to m by divding by 1000 because 1000 mm in a meter.
Then to km by dividing by 1000 because 01000 m in a km.

This knocks 6 zeroes off, so answer is 150 km.

Step-1:
First convert into centimeters

Step-2:
Then convert it into meters

Step-3:
Then convert into kilometers