Repondre au plus vite svp : Exercice 2 :

1) Exprimer les expressions A et B sous forme de 10

A= 10⁴/10-¹²

B= (10-⁴)-⁶


2) Donner l'écriture decimale et l'écriture scientifique de l'expression C :

C= 7x10⁸×3×10-¹⁵
———————
10² x 1,4x10⁴


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