Verified answer

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A=(3-2)-(2-7)

  = 1 - ( - 5 ) =  1 + 5 = 6

B=3-(6-2)+(-5+2)

  = 3 - 4 - 3 = - 4

C=4+3-2-(3+4)

  = 5 - 7 = - 2

D=(-2+4)-(3-7)+3-5+1

  = 2 + 4 + 3 - 4  =  5

E=3-(2+5)-(3-7)-5

  = 3 - 7 - ( - 4 ) - 5

  = 3 - 7 + 4 - 5  =  - 5

F=1-4+(3+5)-(2+7)+2

  = 1 - 4 + 8 - 9 + 2

   =  - 2

Réponse:

A=34

B=-27

C=23

D=41

E=-11

F=38