Question

1) Calcule as operações abaixo
A) 1/6 + 5/6 - 1/2 =
B) 3/4 - 5/6 + 3/4 =
C) 2/-3 . -1/4 . 8/-5 =
D) -64/27 : 128/ -81 =
E) (- 1/2)⁰ =
F) (- 2/3) -¹ =

Answer 1

Resposta:

Explicação passo-a-passo:

Operações com frações:

A) 1/6 + 5/6 - 1/2

= 6/6 - 1/2

= 1 - 1/2

= (2.1 - 1)/2

= (2-1)/2

= 1/2

B) 3/4 - 5/6 + 3/4 =

= 3/4 + 3/4 - 5/6

= 6/4 (:2)/(:2)- 5/6

= 3/2 - 5/6

= (3.3 - 5)/6

= (9-5)/6

= 4/6 (:2)/(:2)

= 2/3

C) 2/-3 . -1/4 . 8/-5 =

= -2/3 . 1/4 . 8/5

= -16/60 (:4)/(:4)

= - 4/15

D) -64/27 : 128/ -81 =

= - 64/27 . (- 18/128)

= 64/128 (:64)/(:64) . 18/27 (:9)/(:9)

= 1/2 . 2/3

= 2/2 . 1/3

= 1/3

E) (- 1/2)⁰

= 1

F) (- 2/3) -¹

= (-3/2)^1

= - 3/2