Répondre :
A=(7x10³ x 5x10^5)/(14x10^6)
=(7x5)/14 x 10^(3+5-6)
=2,5x10²
B=(81x10³ x 6x10^(-10))/(18x10^(-2))
=(81x6)/18x10^(3-10+2)
=27x10^(-5)
=2,7x10^(-6)
=(7x5)/14 x 10^(3+5-6)
=2,5x10²
B=(81x10³ x 6x10^(-10))/(18x10^(-2))
=(81x6)/18x10^(3-10+2)
=27x10^(-5)
=2,7x10^(-6)