Respostas

2014-05-02T17:29:58-03:00
200-(400-8+150)=
200-(550-8)=
200-(+542)=
200-542=
-352

80+2-(74+20-40)=
82-(94-40)=
82-(+54)=
82-54=
28

(80-40+25)-(100-60+15)=
(105-40) - (115-60)=
65-(+55)=
65-55=
10


2014-05-02T18:33:40-03:00
200 - (400-8+150)=
200 - (542)
200-542
-342

80+2-(74+20-40)=
80 + 2 - ( 54)
82 - 54
28

(80-40+25)-(100-60+15)=
65 - ( 55)
65-55
10