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2013-04-10T12:04:33+02:00

B = 35 x 3 = 105 x 10²

 

105/21 = 5

 

tu as donc 5 x 10²/10^-1 = 5 x 10^3

 

 

C = 5 x 12 = 60 x 10^3 / 120 x 10^-3

60/120 = 0.5 x 10^6 = 5 x 10^5

 

D = 3 x 1.2 = 3.6 x 10^-10 / 0.2 x 10^-7

3.6/0.2 = 18 x 10^-3 = 1.8 x 10^-2