3 cm = 3 * 10 mm = 30 mm
11 cm = 11 * 10 mm = 110 mm
7 m = 7 * 100 cm = 700 cm
13 m = 13 * 100 cm = 1300 cm
8 km = 8 * 1000 m = 8000 m
20 km = 20 * 1000 m = 20 000 m
6 cm 9 mm = 60 mm + 9 mm = 69 mm
12 cm 1 mm = 120 mm + 1 mm = 121 mm
5 m 4 cm = 500 cm + 4 cm = 504 cm
14 m 20 cm = 1400 cm + 20 cm = 1420 cm
2 km 145 m = 2000 m + 145 m = 2145 m
3 km 85 m = 3000 m + 85 m = 3085 m
