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oblicz:
2,3 km2 - 65ha =
1 km2 - 20 000 m2 =
540 dm + 4,2 a =
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1 km2 - 20000 m2 = 1 000 000 m2 - 20 000 m2 = 980 000 m2 = 0,98 km2
540 dm2 + 4,2 a = 540 dm2 + 420 m2 = 540 dm2 + 42000 dm2 = 42540 dm2