Réponses

2014-09-05T18:49:45+02:00
A = 7-35/12-5 = -28/7
B= -2×[5+(3+2)×2] = -2×[5+5×2] = -2×[5+10] = -2×15 = -30
C = 21+(-15)/-4-2 = 21-15/-6 = 6/-6 = -1