Răspuns:
1000m=1 km
40 hm=4 km
300dam=3 km
----------------------
1 km+4 km+3 km=8 km
2). 8 km=800 dam
4 dam=
190m=19 dam
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800 dam+4 dam+19 dam=823 dam
3). 6 km=
500dam=5 km
400 hm=40 km
-----------------------------
6 km+5km+40km=51 km
4). 9 dam=90 m
4 hm=400 m
129=
------------------------------
90m+400m+129m=619 m
