Réponses

2013-10-26T09:22:17+02:00
(250-25)*4-(15*5+35*6)
=175*4-(75+210)
=700-285
=415

1000/4+450*(13-7)-900*2
=250+450*6-1800
=250+2700-1800
=1150

3*[600-500:(23+2)]
=3(600-500:25)
=3(600-20)
=3*580
=1740
2013-10-26T09:36:35+02:00
A = (250-25)x4-(15x5+35x6)
   = 225x4-(75+210)
   =900-285=615
B = 1000/4+450x(13-7)-900x2
   =250+450x6-1800
   =250+2700-1800
   =1150
C = 3x[600-500:(23+2)]
   = 3x[600-500:25]
   =3x(600-20)
   =3x580=1740