Respuestas

2013-01-24T21:08:44+01:00

(7+(5)).(12+3(-1+))= (7+5).(12+3-1) = 12.14 = 168

 

-3/8 + 1/2 = -3/8 + 4/8 = 1/8

 

12 + 5/2 - 3 = 24/2 + 5/2 - 6/2 = 23/2 

 

7-(-8)+(1-(-4)+15) = 7+8 + (1+4+15) = 7+8+1+4+15 = 35

 

saludos

  • Usuario de Brainly
2013-01-24T21:10:22+01:00

Resolviendo:

(7+5).(12+3-1)= (12.14)= 168

-3/8+1/2= (-3+4)/8= 1/8

12+(5/2)-3= 12-(1/2)= 23/2

7+8+(1+4+15)= 15+20 = 35

Suerte :)