Réponse:
bonsoir voici la réponse j'espère qu'elle soit correct et bon courage
EXERCICE 1 :
A = 10^-3+3×10^-1
A = 10^(-3-1)+3
A = 10^-4+3
A = 0.0001+3 = 3.0001
B = 10²-5×10^-2
B = 10^(2-2)-5
B = 10^0-5
B = 1-5 = -4
C = 2× 10^3+5×10^-1-3²×10^-2
C = 2×1000+5×0.1-9×0.01
C = 2000+0.5-0.09
C = 2000.59
D = (10²+3)×10^-2-10¹×10^-2
D = 10^-2×10²+10^-2×3-10^(1-2)
D = 10^(-2+2)+10^-2×3-10^-1
D = 1+0.01×3-0.1
D = 0.93
EXERCICE 2 :
10^10×10^-3=10^7
10^9×10^5=10^14
10^9×10=10^10
10^8/10^17=10^-9
10^-10/10^4=10^-14
10^-5×10^16×10^3=10^14
