bonjour
A = 274.274 * 10 ⁴ = 2.74274 * 10 ² * 10 ⁴ = 2.74274 * 10 ⁶
B = 52 000 000 = 5.2 * 10 ⁷
C = 0.002 3 * 10 ³ = 2.3 * 10 ⁻³ * 10 ³ = 2.3 * 10 ⁰ = 2.3
D = 7 824 * 10 ³ = 7.824 * 10 ³ * 10 ³ = 7.824 * 10 ⁶
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moustique = 1.5 * 10 ⁻⁶ kg
éléphant = 6 * 10 ³ kg
6 * 10 ³ : 1.5 * 10 ⁻⁶
= 4 * 10 ⁹
4 * 10 ⁹ moustiques