Răspuns:
a) 1000m 10000dm 100000 cm 1000000mm
6000m 60000m 600000cm 6000000mm
90m 9000dm 9000cm 90000mm
120dm 1200cm 12000mm
680cm 6800mm
2050mm
b) 100000cm 10000dm 1000m 100dam 10hm 1km
50000dm 5000m 500dam 50hm 5km
30000m 3000dam 300hm 30 km
1800dam 180hm 18km
400hm 40km
