Răspuns:
13 km + 400dm = 1700 dam
23 hm - 4000 dm = 190 dam
63 hm - 1300 cm = 6287 m
18 dm - 50 cm = 13 dm
Explicație pas cu pas:
13 km + 400dm = 1300 dam + 400 dam = 1700 dam
23 hm - 4000 dm = 230 dam - 40 dam = 190 dam
63 hm - 1300 cm = 6300 m - 13 m = 6287 m
18 dm - 50 cm = 18 dm - 5 dm = 13 dm
