12 1 2 8 1 2 9 5 3 2

12.1/2 – [8.1/2 + {9 –( 5 – 3 – 2)}]

Answers:

12.1/2 – [8.1/2 + {9 –( 5 – 3 – 2)}]

= 25/2 – [17/2 + {9 – (5 – 1)}]

= 25/2 – [17/2 + {9 – 4}]

= 25/2 – [17/2 + 5]

= 25/2 – 17/2 – 5/1

= (25 – 17 – 10)/2

= (25 – 27)/2

= -(2/2)

= -1