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Salut22
@Salut22
April 2019
1
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Exercice 1 A=5x10^2000
______________
20x10^2001
Calculer le nombre A et donner l'écriture scientifique
exercice 2 C= 2- 1/3 D= 4x10^-3x5x10^9
_____________ __________________
(1/2)² 3x10^6
Justifier, en détaillant les calculs que C=D
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winner123
Verified answer
Bonsoir
A = 5 x 10^2000 sur 20 x 10^2001
A = 0.25 x 10^-1
A = 2.5 x 10
C = (2 -1/3) : (1/2)²
C = (6/3 - 1/3) : 1/4
C = 5/3 : 1/4 = 5/3 x 4 =
20/3
D = 4 x 10^-3 x 5 x 10^9 sur 3 x 10^6
D = 20 x 10^6 sur 3 x 10^6
D = 6.66 x 10^0 = 6.66 x 1 =
6.66
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Verified answer
BonsoirA = 5 x 10^2000 sur 20 x 10^2001
A = 0.25 x 10^-1
A = 2.5 x 10
C = (2 -1/3) : (1/2)²
C = (6/3 - 1/3) : 1/4
C = 5/3 : 1/4 = 5/3 x 4 = 20/3
D = 4 x 10^-3 x 5 x 10^9 sur 3 x 10^6
D = 20 x 10^6 sur 3 x 10^6
D = 6.66 x 10^0 = 6.66 x 1 = 6.66