Question

Simplificando 2,5 % - (6 %)2 + 20/7 , obtemos:
a)37, 86%
b)33, 90%
c)56, 40%
d)33, 14%
e)37, 14%

Answer 1

Resposta: Alternativa b - 33,90 %

2,5 % - (6 %)2 + 7/20

2,5/100 - (6/50)*2 + 7/20

5/2/100 - (3/100)*2 + 7/20

1/40 - 9/2500 + 7/20

1/4 - 9/25 + 7/2

MMC de 4, 25 e 2 = 100

25 - 36 + 350 = 339/100 = 33,9%

Answer 2

2,5/100 - (6/100)^2 + 7/20

= 2,5/100 - 36/10000 + 7/20

(MMC de 100, 10000,20 =10000

=(2,5.100)-(36.1) + (7.500)/10000( tudo sobre 10000)

=250-36+3500/10000

=214+35000/10000

= 3714/10000

=37,14/100

= 37,14%