26) Efetue as operações, 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 × (1/2 + 1/3) =
g) 3 × (1/2 - 1/3) =
h) 5 - (2 × 1/3) =
i) 4 - (3 × 2/3) =
j) 7/9 + 5/12 - 1/6 =
k) 3 + 5/12 - 1/6 =
l) 3 + 5/4 - 1/2 =
m) 3/5 + 6/5 - 1/3 =
Soluções para a tarefa
Olá...
Resolução:
a) 3/4 + 5/6 - 1/2 = mmc 4, 6, 2
9 + 10 - 6/12
19 - 6/12
13/12
b) 2 + 1/2 - 3/4 = mmc 1, 2, 4 = 4
8 + 2 - 3/4
10 - 3/4
7/4
c) 7/8 + 2/15 - 1/6 = mmc 8, 15, 6 = 120
105 + 16 - 20/120
121 - 20/120
101/120
d) 3 - (5/6 + 1/2) =
3 - (5 + 3/6)
3 - 8/6
3 - 4/3 = mmc 1, 3 = 3
9 - 4/3
5/3
e) 7/8 + (2 - 7/5) =
7/8 + (10 - 7/5)
7/8 + 3/5 = mmc 8, 5 = 40
35 + 24/40
59/40
f) 2 × (1/2 + 1/3) =
2(3 + 2/6)
2 × 5/6
10/6 ÷ 2
5/3
g) 3 × (1/2 - 1/3) =
3 × (3 - 2/6)
3 × 1/6
3/6 ÷ 3
1/2
h) 5 - (2 × 1/3) =
5 - 2/3 = mmc 1, 3 = 3
15 - 2/3
13/3
i) 4 - (3 × 2/3) =
4 - 2
2
j) 7/9 + 5/12 - 1/6 = mmc 9, 12, 6 = 36
28 + 15 - 6/36
43 - 6/36
37/36
k) 3 + 5/12 - 1/6 = mmnc 1, 12, 6 = 12
36 + 5 - 2/12
41 - 2/12
39/12 ÷ 3
13/4
l) 3 + 5/4 - 1/2 = mmc 1, 4, 2 = 4
12 + 5 - 2/4
17 - 2/4
15/4
m) 3/5 + 6/5 - 1/3 =
3 + 6/5 - 1/3
9/5 - 1/3 = mmc 5, 3 = 15
27 - 5/15
22/15
Bons estudos.
Resposta:
eu vejo tudo hahahahaha"