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1]care lungime este mai mare ?

28 cm sau 2 dm
45 hm sau 5 km
4900 mm sau 6 dm
2 hm sau 190 m
7 dam sau 68 m
140 hm sau 15 km




2}Calculeaza:
80 hm +19 dam=?m
2000cm-176dm=?dm
6km-32hm=?dam
13cm+8dm=?mm
7m+135dm=?cm
53hm-170 dam=?m
93 dam-49m=?m
23500dm-170m=?dam
7km+200m=?hm
(4200mm+18dm):20=?dm