Question

Se alguém puder me ajudar​

Answer 1

Resposta:

Explicação passo-a-passo:

3) a) (1/4) . (- 1/5) ÷ (2/7) =

(- 1/20) ÷ (2/7) =

(- 1/20) . (7/2) =

- 7/40.

b) (- 3/4) ÷ (- 2/7) ÷ (- 3/5) =

(- 3/4) . (- 7/2) ÷ (- 3/5) =

(21/8) ÷ (- 3/5) =

(21/8) . (- 5/3) =

- 35/8.

c) [(- 3/4) ÷ (- 2/7)] ÷ (7/3) =

[(- 3/4) . (- 7/2)] ÷ (7/3) =

(21/8) ÷ (7/3) =

(21/8) . (3/7) =

9/8.

d) (2/3) ÷ (- 3/7) ÷ (1/8) =

(2/3) . (- 7/3) ÷ (1/8) =

(- 14/9) ÷ (1/8) =

(- 14/9) . (8) =

- 112/8.