Question

2/8-2/3-[2+(1/3+2/5)]

Answer 1

Resposta:

2/8-2/3-[2+(1/3+2/5)]

2/8-2/3-[2+(5/15+6/15)]

2/8-2/3-[2+11/15]

2/8-2/3-[30/15+11/15]

2/8-2/3-41/15

2/8-10/15-41/15

2/8-51/15

2/8-17/5

(2*5-17*8)/40

= -126/40

=-63/20

Answer 2

Resposta:

2/8-2/3-[2+(1/3+2/5)]

2/8-2/3-[2+(5/15+6/15)]

2/8-2/3-[2+11/15]

2/8-2/3-[30/15+11/15]

2/8-2/3-41/15

2/8-10/15-41/15

2/8-51/15

2/8-17/5

(2*5-17*8)/40

= -126/40

=-63/20

ou

-3.15 (Forma de dízima)

Espero ter ajudado e bons estudos.