Réponses

2014-04-13T10:51:59+02:00


(21 x 10³ x 5 x (10^-²)³) / 3 x 10²

= (21 x 5) / 3 x (10³ x (10-²)³) / 10²

= 105/3 x (10³ x 10^-6) / 10²

= 35 x 10-³/10²

= 35 x 10^-5

= 3,5 x 10^-4