Sagot :
bonjour
1 ) 5 * 10 * 1.2 * 10 ⁻⁸ : 2.4 * 10 = 6 *10 ⁻⁷ : 2.4 * 10 = 2.5 * 10 ⁻⁷
2 ) 0.000 456 = 4.56 * 10 ⁻⁴
3 ) 49 * 10⁻⁶ * 6 *10⁵ sur 3 * 10 ⁴ * 7 * 10 ⁻²
= 294 * 10 ⁻¹ : 21 * 10 ² = 14 *10 ⁻³ = 1.4 * 10 ⁻²
4 ) ( - 8 ) ¹⁸
5 * 10 ⁻³ = 5/ 1000
Bonjour,
(5x1.2)/2.4 x10^(6-8-5)= 2.5 x 10^-7
0.000 456= 4.56 x 10^-4
(49x6)/(3x7) x 10^-6+5-4+2)= 14 x 10^-3= 1.4 x 10^-2
(-8) ^18
5 x 10^-3= 0.005