Réponses

2013-03-09T13:17:39+01:00

A = (+22)+(-35)
A = -13

B = -3+4-5+7

B = -8+11

B = 3

C = -13-5+7-3+12
C = -21+19

C = -2

2013-03-09T13:38:41+01:00
A= (+22)+(-35)
= +22 -35
= -13

B= -3+4-5+7
= -8 +11
= 3

C= -13-5+7-3+12
= -21 +19
= -2