Original height: 5.5(2×2)= 1.375 decimeter.

2× 2× (1.5-13.75) = 0.5 cubic decimeter.

8, 8.04 cubic decimeter =8.04 liters =8040 ml

2750 cubic centimeters =2750 milliliters =2.75 liters.

7.5 liters =7.5 cubic decimeters =7500 cubic centimeters.

785 ml = 785 cm = 0.785 cm

9700ml = 0.7L.

14 0.7 = 20 minutes

10,400× 225× 300 =27 million cubic millimeters = 27 cubic decimeters = 27 liters.

1 1, 80000 ÷ (50× 25× 1.2) = 53.33 ≈ 53.

12, omitted

13, 18.6×2. 1=39.06 cubic meters.

14,13× 2.7×1.5×1.33 = 70.0245 tons.

15,22×10×1.8 = 396 cubic meters.

16, (24- 12)÷3=4 ml.

12-4=8 ml. You should thank me.