J'ai fais un exercice seul et j'aimerais savoir si cela est bon : A= ( - 3 - 7 ) x 2
A= 2 x - 3 - 2 x 7
A= - 6 - 14 

B= 8 x ( 10 + 8 )
B= 8 x 10 + 8 x 8
B= 80 + 64

C= - 5 ( 6 - 7 )
C= - 5 x 6 - 5 x 7
C= - 30 - 35
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