Đổi một số đơn vị đo độ dài sau: a/ 270m = ……….dm = …………cm = …………mm b/ 54,9m = ………..dam = ……….hm = ……….km c/ 90km = ………m = ……….cm = ………..mm d/ 4,5km = ……….hm = …………dam = ……..m e/ 15mm = …….m = ………km = ………..dm f/ 250cm = ………m = ……….km = ………mm g/ 0,5 dm =………….m = ………..mm h/ 2,1cm = ………..m = ……….dm l/ 0,05m = ………….mm = ……….cm m/4,52mm = …………dm = ………….cm

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