recopier et completer 1) -2 - 5 = - 2 - 5 + 0 = - 2 - 5 + 5 + ( - 5) = - 2 +... 2) - 4 - ( -1) = - 4 - ( -1 ) +0 = - 4 -( - 1) + ( - 1) + 1= - 4 +... 3) - 10 -1

Bonjour, 

[tex] -2 - 5 \\ = - 2 - 5 + 0 \\ = - 2 - 5 + 5 + ( - 5) \\ = - 2 +(-5) \\ =-7[/tex]

[tex]- 4 - ( -1) \\ = - 4 - ( -1 ) +0 \\ = - 4 -( - 1) + ( - 1) + 1 \\ = - 4 +1 \\ =-3[/tex]

[tex] - 10 -13 \\ = -10 -13 + 0 \\ = -10 - 13 + 13 +(-13) \\ = - 10 +(-13) \\ =-23[/tex]

Bonne journée! =)