Răspuns :
a)60cm=6dm 430cm=43dm 530cm=53dm 1990cm=199dm b)6m=60dm 7m3dm=73dm 9m8dm=98dm 6m80cm=68dm
a) 60 cm=6dm 43ocm=43dm 530cm=53dm 1990cm=199dm
b)6m=60dm 7m 3dm=70dm+3dm=73 dm 9m 8dm=90dm+8dm=98dm
6m 80cm=60dm 8dm=68dm