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16 cm²= 1600 mm²
3,2 cm²= 320 mm²
2,1 dm²= 21000 mm²
0,35 m²= 350000 mm²
Na metry kwadratowe:
6 km²= 600 m²
0,05 km²= 5 m²
75 dm²= 0,75 m²
45 cm²= 0,0045 m²