Question

Resolva as operações abaixo:


a) 2.10^3 . 4.10^2 =




b) 0,5.10^-4 . 2.10^2 =




c)20.10^-5 : 4.10^-2 =




d)(210.10^4 . 10^-1) : 30.10^5 =


Escolha uma:

a) 8.10^-5 b) 1.10^2 c)5.10^3 d)7.10^2

a) 8.10^6 b) 1.10^-3 c)5.10^-7 d)7.10^8

a) 8.10^5 b) 1.10^-2 c)5.10^-3 d)7.10^-2

Answer 1

Resposta:

a) 8.10^5 b) 1.10^-2 c)5.10^-3 d)7.10^-2

Explicação passo-a-passo:

Resolva as operações abaixo:

a) 2.10^3 . 4.10^2 =

2.4 = 8

10^3.10^2 = 10^(3+2) = 10^5

= 8.10^5

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b) 0,5.10^-4 . 2.10^2 =

0,5.2 = 1

10^(-4+2)= 10^(-2)

= 1.10^(-2)

___________

c)20.10^-5 : 4.10^-2 =

20/4 = 5

10^(-5) / 10^(-2)= 10^(-5)-(-2) = 10^(-5+2) = 10^(-3)

= 5.10^(-3)

_____________

d)(210.10^4 . 10^-1) : 30.10^5 =

210/30 = 7

10.^4.10^(-1)/10^5= 10^(4-1)/10^5= 10^3 / 10^5 = 10^(3-5)= 10^(-2)

= 7.10^(-2)

----------------------

Escolha uma:

R.:

a) 8.10^5 b) 1.10^-2 c)5.10^-3 d)7.10^-2