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Sagot :

21) a. 2 x 5 x 10^2

a. 10 x 10^2 =10^3

b. 25x4 x 10^3

b.100 x 10^3

b=10^2 x 10^3.=10^5

Bonjour,

Exercice 21

a= 10 *10²

b= 100*10³ = 10 *10^4

c= 100*10^6 = 10*10^7

d=10 * 10^10

Exercice 22

a=11 000

b= -3,2 784

c= 0,038

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