1 inch is 2.54 centimeters.
1 kilometer=100,000 centimeters
1 centimetre = 10 millimetres.
1 decimetre = 10 centimetres so 9 decimetres = 9*10 = 90 centimetres (not centameters!). Simple!
1 dm
10 cm in 1 dm
1 dm is equal to 100 mm (as 1 dm = 10 cm 1 cm = 10 mm)
none
100
There are about 90 centimeters in a yard because 2.5 cm is about 1 inch
100 mm = 1 dm
1 meter in 10 dm