Répondre :
a = 10⁵ × 100 × 0,0001
= 10⁵ × 10² × 10⁻⁴
= 10⁵⁺²⁻⁴
= 10³
b = 10⁻⁴ × 10⁵
= 10⁻⁴⁺⁵
= 10¹
= 10
c = 10⁻⁴ × 10⁵ × 0,001
= 10⁻⁴ × 10⁵ × 10⁻³
= 10⁻⁴⁺⁵⁻³
= 10⁻²
= 10⁵ × 10² × 10⁻⁴
= 10⁵⁺²⁻⁴
= 10³
b = 10⁻⁴ × 10⁵
= 10⁻⁴⁺⁵
= 10¹
= 10
c = 10⁻⁴ × 10⁵ × 0,001
= 10⁻⁴ × 10⁵ × 10⁻³
= 10⁻⁴⁺⁵⁻³
= 10⁻²