Convert the given volumes to quantities with the same units. For this item, convert all volumes to m³
(1) 1.2x10 m³ = 12 m³
(2) 1.2x10^8 cm³ x (1 m / 100 cm)³ = 120 m³
(3) 2.0x10^4 dm³ x (1 m / 10 dm)³ = 20 m³
(4) 1.2x10^8 mm³ x (1 m / 1000 mm)³ = 0.12 m³
The least among the given is the fourth choice, 1.2x10^8 dm³.