How do you convert 1,950,000,000 mm to km?

##1,950,000,000mm = 1,950Km##

When you convert a value to a bigger unit, the number gets smaller. (There are fewer of them.) This is done by dividing

When you convert a value to a smaller unit, the number gets bigger.(There are more of them.) This is done by multiplying.

Km is the biggest distance of the metric system. (Just more than half a mile.)

mm the smallest of the usual lengths in the metric system. (About 25 mm makes 1 inch)

The units from Biggest on the left to smallest on the right are:

##color(red)(Km)color(white)(xxx) Hmcolor(white)(xxx) Dmcolor(white)(xxx) color(red)(m) color(white)(xxx)dmcolor(white)(xxx) cmcolor(white)(xxx) color(red)(mm) ##

The conversion factor between any of the adjacent units is 10.

##larr xx 10 and rarr div 10##

##Km xx1000rarr m xx 1000rarr mm## To convert big to small.

##Km larr 1000 div m larr 1000 div mm##To convert small to big.

##1,950,000,000mmdiv 1000 rarr 1,950,000m##

##1,950,000m div 1000 rarr 1,950Km##

is much easier than all the zeros!

##1.95xx 10^9 div 10^6 = 1.95 xx 10^3 = 1950Km##