zamień jednostki: 6,8dm=___cm 500kg=___t 1,4h=___s 800N=___kN 6,8dm=___m 0,35kg=___g 15min=___h 1200N=___kN 120m=___km 250dag=___kg 30s=___min 3m²=___cm²

6,8dm = 68cm 500kg = 0,5t 1,4h = 5040s 800N = 0,8kN 6,8dm = 0,68m 0,35kg = 350g 15min = 0,25h = 1/4h 1200N = 1,2kN 120m = 0,12km 250dag = 2,5kg 30s = 0,5min = 1,2min 3m2 = 30000cm2 1kN = 1000N 1kg = 1000g 1kg = 100dag 1min = 60s 1h = 60min = 3600s 1m = 10dm 100cm 1m2 = 10000cm2 1t = 1000kg