Réponse :
Explications étape par étape
Bonjour
Donner l'écriture scientifique des nombres suivants :
A = 20°7 x 5°7
A = (20 x 5)^7
A = 100^7
A = (10^2)^7
A = 10^(2*7)
A = 1 x 10^14
B = 200°3 x 0,00052°2
B = (2 x 10^2)^3 x (5,2 x 10^(-4))^2
B = 2^3 x 10^(2*3) x 5,2^2 x 10^(-4*2)
B = 8 x 10^6 x 27,04 x 10^(-8)
B = 216,32 x 10^(6-8)
B = 2,1632 x 10^2 x 10^(-2)
B = 2,1632 x 10^(2-2)
B = 2,1632
C = 5 x 10°3 x (2 x 10°-2)3
C = 5 x 10^3 x 2^3 x (10^(-2))^3
C = 5 x 8 x 10^3 x 10^(-2*3)
C = 40 x 10^(3-6)
C = 4 x 10 x 10^(-3)
C = 4 x 10^(1-3)
C = 4 x 10^(-2)
D = 5°-1 x 10°3
D = 5^(-1) x (2 x 5)^3
D = 5^(-1+3) x 2^3
D = 5^2 x 8
D = 25 x 8
D = 200
D = 2 x 10^2
E = 28 x 10°4/ 0,4 x 10°7
E = 28/0,4 x 10^(4-7)
E = 70 x 10^(-3)
E = 7 x 10 x 10^(-3)
E = 7 x 10^(-2)
