Réponses

  • Utilisateur Brainly
2014-05-09T16:16:43+02:00
2-(-5) =
2+5 = 7

-2-(+5) =
-2-5=
-7

3-4-9-(-8)  =
3-4-9+8 =
11-13 = -2

3-(7-3)-(5-20)

3-(4)-(-15) =
3+4+15 =
22
Meilleure réponse !
2014-05-09T16:17:19+02:00
2-(-5)  = 2 +5 =7 

  -2-(+5)  = -2 -5 = -7

  3-4-9-(-8)   = 3-13 +8 =-13+11 = -2

3-(7-3)-(5-20)   = 3 -(4) -(-15)= 3+4 +15 =22


pour info - + - = +