Respostas

2014-05-26T22:08:40-03:00
A) -2 -2 - 7 + 4 - 2 + 17= -13 + 21 = 8
B) 10 - [6+ (-5) + 2 + (-2) - 7]
10- [6-5+2-2-7]
10-[8-14]
10-[-6]
16

C) 11+{-4-1+[12:(-4)+1]}
11+{-5+[-3+1]}
11+{-5+[-2]}
11+{-7}
4