12.4 km = (a)   m

6 L 25 ml = (a)   ml

14 km 690 m = (a)   km

7 kg 9 g = (a)   g

9.42 kg = (a)   g

0.42 kg = (a)   g

6045 m = (a)   km

9.8 m = (a)   cm

586 cm = (a)   m