Question

calcule o valor das expressões

a) 3/5 - 1 - 2/5

b) 4 - 1/10 + 2/5

c) 1/3 - (-3/5) + 7/10

d) - 2 - (-1/2) - 1/8

e) 5/12 + (-1/4) - (+1/6)

respostas, pfvr

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Answer 1

Oi...

a) 3/5 - 1 - 2/5  =

3 - 2/5 - 1

1/5 - 1⇒ mmc = 5

1 - 5/5

- 4/5

b) 4 - 1/10 + 2/5  ⇒mmc = 10

40 - 1 + 4/10

43/10

c) 1/3 - (-3/5) + 7/10

1/3 + 3/5 - 7/10⇒mmc = 30

10 + 18 + 21/30

49/30

d) - 2 - (-1/2) - 1/8

- 2 + 1/2 - 1/8⇒mmc = 8

- 16 + 4 - 1/8

- 13/8

e) 5/12 + (-1/4) - (+1/6)

5/12 - 1/4 - 1/6⇒mmc = 12

5 - 3 - 2/12

0/12

0

Espero ter ajudado.