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transofrma si calculeaza:
7m + 3dm =? dm

18 dm + 5 cm =? cm
7 km + 8hm =? hm
13 hm + 8 dam =? dam
17 km -12 km=? hm
13 m-14cm=? cm
18 km - 13 dam=? dam
25 dam- 13 m=? m