Respostas

2013-09-12T08:17:37-03:00
-10 . (0,5 + 0,5)
-10 . 1
-10

(1 + 2/3) . (-1 + 1/7)
(1 + 0,6667) . (-1 + 0,14285)
1,6667 . (-0,85715)
- 1,4286


2013-09-12T16:13:17-03:00
-10.(0,5*+0,5)
-10.(1)
-10

*1/2=0,5

(1+2/3).(-1+1/7)
(1/3+2/3).(-1/7+1/7)
3/3.0
0