Réponses

2014-10-27T15:37:47+01:00
A= 3-4 x ( 5-2) 
= 3 - 4 X 3
= 3 - 12
= - 9

B= 3 x 4-2x(4-6)
= 12 - (8-12)
= 12- (-4)
= 12+4
= 16

C= 5-2 x3 +2x7
= 5- 6+14
= 13
2014-10-27T15:39:45+01:00
A= 3-4x(5-2)
A= 3-4x3
A= 3-12
A=-9

B=3x4-2x(4-6)
B=3x4-2x-2
B=12- -4
B=16

C=5-2x3+2x7
C=5-6+14
C= -1+14
C=13