Question

Efetue dando o resultado na forma irredutivel:

a) 2/3 – (1/2+1/3)=
b) – 5/4 – (2 – 1/3)=
c) – 4/9 - (-3 – 2/3)=

Answer 1

a) 2/3 - (3/6 + 2/6) =
    2/3 - 5/6 =
    4/6 - 5/6 =
    = -1/6

b) -5/4 - (2 - 1/3) =
    -5/4 - (6/3 - 1/3) =
    -5/4 - 5/3 =
    -15/12 - 20/12 =
    = -35/12

c) -4/9 - (-3 - 2/3) =
    -4/9 - (-9/3 - 2/3) =
    -4/9 - (-11/3) =
    -4/9 + 11/3 =
    -4/9 + 33/9 =
    = 29/9