Réponses

2013-10-06T20:26:30+02:00
A)25-7+12-25+38-45 = -2

B)(-56)*7*25*0*(-45)= 0

C)1.8+(-2.7)-(-2.3)-(+2.8)=1.8-2.7+2.3-2.8= -1.4

D)5*(-3)*(0.5)*(-2)*2=-15*0.5*-4=15*4*0.5= 30