Tính: 3 kg × 2

3 kg × 2 = ……….

3 m × 8 = ……….

3 l × 7 = …………...

3 dm × 4 = ………

3 km × 9 = ………

3 mm × 10 = ………

3 kg × 2 = 6 kg

3 m × 8 = 24 m

3 l × 7 = 21 l

3 dm × 4 = 12 dm

3 km × 9 = 27 km

3 mm × 10 = 30 mm