Question

1/6 - [ 1,1 - (1/2 - 0,4) ]

Answer 1

1/6-[1,1-(1/2-0,4)]=
1/6-[1,1-0,1]=
1/6-1,0=(tira o mmc)
Fica assim:
1/6-1,1=1-6/6
1-6/6=-5/6

Answer 2

1/6-[11/10-(1/2-4/10)]∴ 1/6-[11/10-(5-4/10)]∴ 1/6-[11/10 -(1/10)]∴1/6-[11/10-1/10]∴ 1/6- 10/10 ∴ 10-60/60∴-50/60= -5/6