bjr
mega = x 10⁶ = x 1 million
=> 7MH = 7 x 10⁶ H
milli = x 10⁻³ ou : 1000 (1 mm = 0,001 m)
=> 2ms = 2 x 10⁻³ s
giga = x 10⁹ = x 1 milliard
=> 5 GW = 5 x 10⁹ W
micro = = 10⁻⁶
=> 6 microV = 6 x 10⁻⁶ V
je vous laisse les 2 derniers
nano = 10⁻⁹
déca = x 10 puisque 1 dam = 10 m
