Efetue, dando o resultado na forma irredutível:
a) 3/4 + 5/6 - 1/2 =
b) 2 + 1/2 - 3/4 =
c) 7/8 + 2/15 - 1/6 =
d) 3 - (5/6 + 1/2) =
e) 7/8 + (2 - 7/5) =
f) 2/3 - (1/2 + 1/3) =
g) 3 - (1/2 - 1/3) =
h) - 5/4 - (2 - 1/3) =
i) - 4/9 - (- 3 - 2/3) =
j) 7/9 + 5/12 - 1/6 =
k) 3 + (5/4 - 1/2) =
l) - 3/5 + 6/5 - 1/3 =
Soluções para a tarefa
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a) 3/4 + 5/6 - 1/2 = 1 1/12
b) 2 + 1/2 - 3/4 =1 3/4
c) 7/8 + 2/15 - 1/6 = 109/120
d) 3 - (5/6 + 1/2) =2 4/6
e) 7/8 + (2 - 7/5) = 1 19/40
f) 2/3 - (1/2 + 1/3) =1/6
g) 3 - (1/2 - 1/3) =2 1/6
h) - 5/4 - (2 - 1/3) =3 11/12
i) - 4/9 - (- 3 - 2/3) =1 8/9
j) 7/9 + 5/12 - 1/6 =1 1/36
k) 3 + (5/4 - 1/2) =3 3/4
l) - 3/5 + 6/5 - 1/3 = 4/15
b) 2 + 1/2 - 3/4 =1 3/4
c) 7/8 + 2/15 - 1/6 = 109/120
d) 3 - (5/6 + 1/2) =2 4/6
e) 7/8 + (2 - 7/5) = 1 19/40
f) 2/3 - (1/2 + 1/3) =1/6
g) 3 - (1/2 - 1/3) =2 1/6
h) - 5/4 - (2 - 1/3) =3 11/12
i) - 4/9 - (- 3 - 2/3) =1 8/9
j) 7/9 + 5/12 - 1/6 =1 1/36
k) 3 + (5/4 - 1/2) =3 3/4
l) - 3/5 + 6/5 - 1/3 = 4/15
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