bjr
la règle est simple : on ajoute les exposants
23)
a) 10³ x 10³ = 10³⁺³ = 10⁶
........
f) 10⁸ x 10 = 10⁸ x 10¹ = 10⁸⁺¹ = 10⁹
24)
a) 10⁴ x 10⁻³ = 10⁴⁻³ = 10¹ = 10
b) 10⁻⁴ x 10³ = 10⁻⁴⁺³ = 10⁻¹
d) 10⁵ x 10⁻⁵ = 10⁵⁻⁵ = 10⁰ = 1
f) 10 x 10⁻⁵ = 10¹ x 10⁻⁵ = 10¹⁻⁵ = 10⁻⁴
