Voici la question 1 et 2 Merci ;)

Bonsoir

A = 10^8 x 10^-6 x 10² = 10^4
B = 10² x 10^3 : 10^-4 = 10^5/10^-4 = 10^9
C = (10^4)² x 10^-2 sur 10^6 = 10^6/10^6 = 10^0 = 1

D = 2^4 x 8 = 2^4 x 2 x 2² = 2 ^7
E = 9 x 27 = 3² x 3 x 3² = 3^6
F = 3^-7 x 81 = 3^-7 x 3^4 = 3^ -3