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Completeaza spatiile punctate : a) 4m=40.....=4000.....=400.....=.....m b) 8km=.....dam=80.....=.....m=.....km c) 90hm=.....dm=9000.....=.....dam d) 5000dam=.....km=500.....=.....hm=.....dm e) 30000dm=30.....=.....dam=300).....=3.....=.....dm f) 700000cm=700.....=7.....=70.....=7000.....=.....dam