Understanding the Metric System

1 million microphones = 1 megaphone
1 million bicycles = 2 megacycles
52 cards = 1 decacards
1/2 lavatory = 1 demijohn
2000 mockingbirds = 2 kilomockingbirds
3-1/3 tridents = 1 decadent
10 monologs = 5 dialogues
2 monograms = 1 diagram
1 millionth of a fish = 1 microfiche
10 rations = 1 decoration
10 millipedes = 1 centipede