Factor label conversions?

Question

I can't figure out the conversion factors for these

How many kilometers in 100 meters?

and how many milliliters in 0.500 liters?

Answer 1

1km=1000m, so 100m=0.1km

1 L=1000mL, so 0.500L=500mL

Answer 2

1 km = 1000 m.  So,

? km = 100 m * (1 km / 1000 m) = 0.1 m

1 L = 1000 mL.  So,

? mL = 0.500 L * (1000 mL / 1 L) = 500 L

Answer 3

kilo hecto deci (meter,gram,liter) deka centi milli

move decimal left 3 place to change meters to km. 0.1 km.

move decimal right 3 places to change liters to mL. 500 mL