Trick to remember Units of distance

Units of distances (i.e kilometer, metre, centimetre, millimetre) are very confusing.

We get struck at which is greater or smaller and by how much amount it is greater or smaller.

I'll share a trick to remember it easily.

Here it goes like:

Arrange units of distance in decreasing order:

kilometer > hectometre > decametre > metre > decimetre > centimetre > millimetre

    km            hm               dcm            m            dm              cm            mm

These distances are related as: 
1 kilometre (km) = 10 Hectometres (hm)

1 Hectometre (hm) = 10 Decametres (dcm)

1 Decametre (dcm) = 10 Metres (m)

1 Metre (m) = 10 Decimetres (dm)

1 Decimetre (dm) = 10 Centimetres (cm)

1 Centimetre (cm) = 10 Millimetres (mm)


Remember this decreasing order as:

King Henry Died a Miserable Death Called Measles.

I think, it is quite easy to remember this.