Question

100 - 2x ( 3 : 3 + 9 : 3 ) : 8 + 40 : 5 =

Answer 1

1000 - 2 x ( 3 : 3 + 9 : 3 ) : 8 + 40 : 5=
1000 - 2 x ( 1 + 3 ) : 8 + 8=
1000 - 2 x 4 : 8 + 8 =
1000 - 1 + 8 =
1000 - 9 = 991

Answer 2

100- 2 x (3:3+9:3) :8+40:5= 
100- 2x (1+3) :8+8=
100- 2x4 :8+8=
100- 8:8+8=
100 -1 +8=
99+8= 107