Tính: 3 kg x 2 3 m x 8 3 l x 7 3 dm x 4 3 km x 9 3 mm x 10

3 kg x 2 = 6 kg

3 dm x 4 = 12 dm

3 m x 8 = 24 m

3 km x 9 = 27 km

3 l x 7 = 21 l

3 mm x 10 = 30 mm