IV. Transformer les soustractions en additions puis calculer
(-1)-(-7)=
(+5)-(-2) = ....
(-8)-(+6)=.
A=4-(-2) + (-8)-5+1
(+2) - (+ 8) =
=
B=-5+ (-1)-(-6)-2+3
C = (2-5) + (6-3)-(-4-4) D= -(1-4)-(7-8)+(2-10)