Bonjour,
6) 1 tonne = 10⁶ g
551,7 x 10¹⁴ g = 551,7 x 10⁸ [x 10⁶ g] = 551,7 x 10⁸ t
7) 1 mm = 10⁻³ m
786,5 x 10⁶ m = 786,5 x 10⁹ [x 10⁻³ m] = 786,5 x 10⁹ mm
8) 1 GWh = 10³ MWh
43,69 x 10¹² MWh = 43,69 x 10⁹ [x 10³ MWh] = 43,69 x 10⁹ GWh
9) 1 W = 10⁻⁶ GW
234,6 x 10¹⁰ GW = 234,6 x 10¹⁶ [x 10⁻⁶ GW] = 234,6 x 10¹⁶ W
10) 1 km = 10³m
26,76 x 10⁸ m = 26,76 x 10⁵ [x 10³ m] = 26,67 x 10⁵ km
