Respuestas

2012-09-09T04:49:04+02:00

A. 3-2+5+3+2+7+1-2 = 17

 

B.22-12-3+5+6-7-8+4 =7

 

C.3-2-3-4-5-6-12-11 =-40

 

 D.22-2+3-4-5-6-7 =1