Tính: 360 ml + 270 ml

360 ml + 270 ml = 630 ml

1 l – 500 ml = 500 ml

400 ml + 300 ml – 200 ml = 500 ml

12 ml × 3 = 36 ml

72 ml : 2 = 36 ml

15 ml × 4 : 6 = 10 ml