1. Resolva as operações abaixo envolvendo frações:
a) 3 1
_ - _
4 2
b) 3 1
_ + _
6 2
c) 5 2 1
_ - _ + _
10 5 2
d) 7 1
_ - _
10 5
2.Encontre um valor para X
a) x 1
4x-3= _ + _
2 5
b) 7x
_ - 1
6
Com as contas se puder!
Soluções para a tarefa
Respondido por
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1 - a) 3 1 3 - 2 1
--- - --- = --------- = ---
4 2 4 4
b) 3 1 3 + 3 6
--- + --- = -------- = --- = 1
6 2 6 6
c) 5 2 1 5 - 4 + 5 -6 -3
--- - --- + --- = ------------- = ---- = ---
10 5 2 10 10 5
d) 7 1 7 - 2 5 1
--- - --- = ------- = ---- = ----
10 5 10 10 5
2 - a) x 1
4x-3= --- + ---
2 5
4x - 3 = 5x + 2
----------
10
40x - 30 = 5x + 2
35x = 32
x = 32/35
b) 7x
--- - 1 = 0
6
7x/6 = 1
7x = 6
x = 6/7
--- - --- = --------- = ---
4 2 4 4
b) 3 1 3 + 3 6
--- + --- = -------- = --- = 1
6 2 6 6
c) 5 2 1 5 - 4 + 5 -6 -3
--- - --- + --- = ------------- = ---- = ---
10 5 2 10 10 5
d) 7 1 7 - 2 5 1
--- - --- = ------- = ---- = ----
10 5 10 10 5
2 - a) x 1
4x-3= --- + ---
2 5
4x - 3 = 5x + 2
----------
10
40x - 30 = 5x + 2
35x = 32
x = 32/35
b) 7x
--- - 1 = 0
6
7x/6 = 1
7x = 6
x = 6/7
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