Réponse:
a) 10⁴ x 10⁷ = 10⁴+⁷ = 10¹¹
b) 10⁴÷10⁷= 10⁴–⁷ = 10-³
c) (10⁴)⁷ = 10⁴×⁷ = 10²⁸
d) 10-⁴ × 10⁷ = 10-⁴+⁷ = 10³
e) (10-⁴)⁷ = 10-⁴×⁷ = 10-²⁸
f) 10-⁴ ÷ 10⁷ = 10-⁴-⁷ = 10-¹¹
g) 10⁴ ÷ 10-⁷ = 10⁴-(-⁷) = 10⁴+⁷ = 10¹¹
h) 10-⁴ × 10-⁷ = 10-⁴+(-⁷) = 10¹¹
i) 10-⁷ × 10⁴ = 10-⁷+⁴ = 10-³
j) (10-⁷)-⁴ = 10-⁷×(-⁴) = 10²⁸
