a fost răspuns

30 hm-5dam=?m   5 cm-3mm=?mm       50 m+1 dam=?dm     800km+20 dam=?hm

Răspuns :

3000m-50m=2950m
50mm-3mm=47mm
5dm+100dm=105dm
8000hm+2hm=8002hm

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