bonsoir
C = 2 ³ x 10 ⁻⁶ / 5 ⁻³ * 10 ²
C = 8 * 1/1000 000 : 1 /125 * 100
C = 8 /1000 000 ; 100 /125
C = 8 / 1000 000 * 125 /100
C = 1000 / 100 000 000
C = 0.000 01
C = 10 ⁻⁵
D = 5 ¹² * 10 ⁻³ * 3 ⁸ : 10 ⁻⁵ * 3 ⁶ * 5 ¹⁰
D = 5 ² * 10 ² * 3 ²
D = 25 * 100 * 9
D = 22 500
D = 2.25 * 10 ⁴