You divide the number of millimeters by a million.
50 kilometers = 50,000,000 millimeters
You're going to be writing a small length in terms of a really long one. That means the answer is going to be really small. You've chosen to express 50 mm in km, and that's 50 millimeters or 50 thousandths of a meter in terms of kilometers or thousands of meters. To convert millimeters to meters, you'll have to divide by 1,000. And to convert meters to kilometers, you'll have to divide by 1,000. So to convert millimeters to kilometers, you'll have to divide by 1,000,000 (a million), or 106. 50 mm / 106 = 50 x 10-6 km or 5 x 10-5 kilometers, or 0.00005 kilometers.
50 kilometers is 50,000,000 millimeters.
Since 1 millimeter = 1.0 × 10-6 kilometers,25 millimeters = 2.5 × 10-5 kilometers.
000000.5
By dividing the number of milimeters by 1,000,000.
0.5 is the greatest value of 50,000 millimeters, 0.5 kilometers, 50 meters, and 5000 centimeters. 50,000 millimeters is the same as 50 meters. 0.5 kilometers is the same as 500 meters. 50 meters is, of course, 50 meters. 5000 centimeters is 50 meters.
50mm equals 0.00005km
Multiply kilometers by one million to get millimeters.
To convert meters into kilometers, just divide by 1000 _______________________________________________________________________There are 1000 millimeters in 1 meter. In addition, there are 1000 meters in one kilometer. Thus, there are 1,000,000 millimeters in 1 kilometer. Divide whatever number you have in millimeters by 1,000,000 and you will get the number in kilometers.
25.4 mm = 1 in → 50 mm = 50 ÷ 25.4 in ≈ 1.97 in
Divide it by 106 (or 1 million).