1) 1m = 10dm
2) 1dm = 100mm
3) 1dm = 10cm
4) 10dm = 1 m
5) 1 cm = 10mm
6) ?
7) 1000cm = 10m
8) 2m = 2000mm
9) 0.5m = 5dm
10) 0.4dm = 40mm
11) 100dm = 10m
12) 20dm = 200cm
13) 40cm = 400mm
14) 150cm = 15dm
15) 1000mm = 1m
16) 200dm = 20m
17) 700cm = 7m
18) 130cm = 1.3m
19) 500mm = 5dm
20) 30km = 300,000dm
21) 4m = 400cm
22) 120mm = 12cm
23) 27dm = 270cm