Question

14) Descubra os resultados:
a) -3/2 + 2/3 =
b) -2/5 - 1/3 =
c) -3/5 + 6/5 =
d) (-3/5).(-1/3) =
e) (-4/3) - ( + 1/2) =
1) (-2/5) : (-1/2) =
g) (-1/3): ( + 1/5) =​

Answer 1

Resposta:

Explicação passo-a-passo:

a) -3/2 + 2/3

MMC (2,3) = 6

= [3.(-3) + 2.2]/6

= [-9 +4]/6

= - 5/6

b) -2/5 - 1/3

Mmc (5,3) = 15

= [3.(-2) - 5.1]/15

=[-6 - 5]/15

= - 11/15

c) -3/5 + 6/5

= 6/5 - 3/5

= 3/5

d) (-3/5).(-1/3)

= - 3/5 . (-1/3)

= 3/15 (:3)/(:3)

= 1/5

e) (-4/3) - ( + 1/2)

= - 4/3 - 1/2

MMC (3,2)= 6

= [2.(-4) - 3.1]/6

= (-8-3)/6

= - 11/6

F) (-2/5) : (-1/2)

= -2/5 . (-2)

= 4/5

g) (-1/3): ( + 1/5)

= - 1/3 . 5

= - 5/3