Question

Fração, preciso da resposta​

Answer 1

Resposta:

a. -27/50

b. 184/216

c. 63/192

d. 28/200

Explicação:

a. (-1/2)-(-1/5)² =

-1/2-1/25 =

-(50÷2×1)-(50÷25×1)/50 =

-25-2/50 =

-27/50

b. (2/3)²×(5/6÷2/5-1/4) =

4/9×(5/6÷2/5-1/4) =

4/9×(25/12-1/4) =

4/9×46/24 =

184/216

c. ((-1/3)+5/8)÷8/9 =

(-8+15/24)÷8/9 =

7/24÷8/9 =

7/24×9/8 =

7×9/24×8 =

63/192

d. ((-1/5)²-2/5+1/5)×(-7/8) =

(1/25-2/5+1/5)×(-7/8) =

(1-10+5/25)×(-7/8) =

(-9+5/25)×(-7/8) =

-4/25×(-7/8) =

28/200