Réponse:

bonjour je vais t'aider

7/10=0.7 =7×10-¹

4/1000=0.004× 10-³

75/100=0.75 7.5×10-¹

89/1 000 000=0.000089=8.9× 10-⁵

ex 39

5 × 10⁶ =5×1000 000= 5 000 000

7 × 10³ = 7 × 1000 = 7000

2 × 10-³ = 2/1000 =0.002

9 × 10-⁶ =9/1 000 000= 0,000009