Réponse :
Bonjour,
305 = 3.1 x 10^2
0.25 x 10²= 2.5 x 10^1
0.0605 = 6.1 x 10^-2
0.021 = 2.1 x 10^-2
1040 = 1.0 x 10^3
0.010 = 1.0 x 10^-2
1/8 = 0.125 = 1.3 x 10^-1
4.05 x 10^-3 = 4.1 x 10^-3
13 x 10^-6 = 1.3 x 10^-5
Explications :
Le ^ signifie puissance