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Sagot :

Réponse:

A=9-4+(6-11)-(-5-2)

= 9-4+(-5)-(-7)

= 9-4+2

= 7

B= -16-(-8+4)-(-5+12)

= -16-(-4)-7

= -19

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

= 7-5+(-1)-(-5)

= 7-5+4

= 6

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