Réponses

2012-10-15T18:23:34+02:00

7X3-2= 21-2= 19

7X3-7X2= 21-14= 7

7+3:3+2= 10:5= 2

2012-10-15T18:36:03+02:00

A*B-C=7*(-3)-(-2) =-21+2=-19

A*B-A*C=(7*(-3))-(7*(-2))=-21-(-14)=-7

(7+(-3))/(-3+(-2))=-21/-5=21/5

bonne chance