an co 8000 dong hoa mua 2 quyen vo gia moi quyen vo la 1500 dong hoi an con lai bao nhieu tien? bai 5: 3dm 4cm....cm 5m 90cm....cm 6m 5dm.....cm 9m.....cm 7m 40cm...cm 4m 6cm.....cm 50dm....m 400cm....m bai 6: 3dm 4cm +40cm= 5m 90cm-43cm= 6m 5dm-50cm= 9m-500cm= 7m 40cm-740cm= 4m 6cm-46cm= 5dm 9cm-56cm= 400cm-40cm=

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