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Sagot :

Exo 1 :
a) -5-2 = -7
b) 2-(-3) = 2+(+3)= 2+3 = 5
c) -5+7 = 2
d) 8+3(-6) = 8-18 = -10
e) 7(-5 + 2) = -35+14
f) 2x3 -(6+5) = 6 -11 = -5

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