Odpowiedzi

2009-05-05T21:14:26+02:00
7 km2 = 7000000 m2
90 km2 = 90000000 m2
4 dm2 = 400 cm2
0,5cm2 = 50 mm2
6 m2 = 60000 cm2
78 m2 = 780000 cm2
2 3 2