Question

alguém me ajuda, por favor

Answer 1

Resposta:

A)-22/15

B)-3,344

C)- 1/30

Explicação passo-a-passo:

A)(-2/3).(+6/5)-(-1/2).(-4/3)

(-2/3)×(+6/5)-(-1/2)×(-4/3)

(-2/3)×6/5+1/2×(-4/3)

(-2/3)×(6/5)-(-1/2)×(-4/3)

-2/3)×6/3+1/2×(-4/3)

(-2/3)×(6/5)-(-1/3)×(-4/3) aqui risque os dois numeros 3 e 6

-2× 2/5+1/2×(-4/3)

-2× 2/5-1/2×4/3

-2× 2/5+1/2(-4/3) aqui risque os dois numeros 2 e 4

-2× 2/5-2/3

-2× 2/5+1/2×(-4/3)

-2× 2/5

-2/1×2/5

-2×2/1×5

-4/1×5

-2×2/1×5

-4/5

-2×2/ 5+ 1/2×(-4/3)

-4/5-2/3

-12+10/15

-22/15

-4/5-2/3

-22/15

Resposta

-22/15

B)-(3,2.(-1,1)+2).(-2,2)

-(3,2×(-1,1)+2)×(-2,2)

3,2×(-1,1)

-(3,2×1,1)

-3,52

(-3,2×(-1,1)×2)×(-2,2)

-(-3,52+2)×(-2,2)

-3,52

-(3,52-2)

-1,52

-(-3,52+2)×(-2,2)

-(-1,52)×(-2,2)

1,52×(-2,2)

-(1,52×2,2)

-3,344

1,52×(-2,2)

-3,344

Resposta

-3,344

C)2,2-((-2,5).1/4.((2/5.1/2-1)×(10/3)+2)-1/2)

2,2-((-2,5)×1/4×((2/5×1/2-1)×(10/3)+2)-1/2)

2,2-(-2,5)×1/4×(1/5-1)×(-10/3)+2)-1/2

2,2((-2/5)×1/4×(2/5×1/2-1)×(-10/3)+2)-1/2

2,2

22/10

22/10 aqui risque os dois numeros 22 e 10

11/5

2,2((-2/5)×1/4×(2/5×1/2-1)×(-10/3+2)-1/2

11/5-((-2/5)×1/4×(1/5-1)×(-10/3)+2)-1/2

1/5 -1

1-5/5

-4/5

- 4/5

11)5-((-2,5)×1/4×(1/5-1)×((-10/3)+2)-1/2

11/5-((-2/5)×1/4×(-4/5)×(-10/3)+2)-1/2

11/5-(-2/5+1/4×4/5×10/3+2)-1/2

11/5-((-2/5)×1/4×(-4/5)×(-10/3)+2)-1/2 aqui risque os dois numeros 4 e 4

11/5-((-2/5×1/5×10/3+2)-1/2

11/5-((-2/5)×1/4×(-4/5)×(10/3)+2)-1/2 aqui risque os dois numeros 5 e 10

11/5-(-2×1 5× 2/3+2)-1/2

-2×1/5×2/3

-2/1 × 1/5 × 2/3

2×1×2/1×5×3

-4/1×5×3

-2×1×2/1×5×3

-4/15

11/5-(-2×1/5×2/3+2)-1/2

11/5(-4/15+2)-1/2

-4/15+2

-4+30/15

26/15

11/5-(-4/15+2)-1/2

11/5-26/15-1/2

66-52-15/30

-1/30

- 1/30

11/5-26/25-2/1

- 1/30

Resposta

- 1/30