Question

9000km to m = 15,000 m to km80mm to dm

Answer 1

For every 1 km = there are 1,000 meters. Therefore:

$9,000\operatorname{km}\times\frac{1,000m}{1\operatorname{km}}=9,000,000m$

15,000 m to km is:

$15,000m\times\frac{1\operatorname{km}}{1,000m}=\frac{15000}{1000}=15\operatorname{km}$

For every 1 decimeter, there are 100 millimeters.

$80\operatorname{mm}\times\frac{1dm}{100\operatorname{mm}}=\frac{80}{100}=0.8dm$